All Exams >
Class 5 >
Science Class 5 >
All Questions
All questions of Plant Life for Class 5 Exam
Which of the followings is /are agent(s) of dispersal?- a)Air
- b)Water
- c)Animal
- d)All of these
Correct answer is option 'D'. Can you explain this answer?
Which of the followings is /are agent(s) of dispersal?
a)
Air
b)
Water
c)
Animal
d)
All of these
|
Ameya Kapoor answered |
Agent(s) of Dispersal
Dispersal is the movement of organisms from one place to another. It is important for the survival and growth of many species. There are several agents of dispersal that help organisms move from one place to another. The options given in the question are:
a) Air
b) Water
c) Animal
Let us discuss each of these agents of dispersal in detail.
Air:
Air is a very important agent of dispersal for many plants and animals. Wind can carry seeds, fruits, and pollen grains to distant places. For example, dandelion seeds have feathery structures that help them float in the air. Similarly, many trees produce winged fruits that can be carried away by the wind.
Water:
Water is another important agent of dispersal. Many aquatic plants and animals use water to move from one place to another. For example, some plants produce seeds that can float on water. Similarly, fish and other aquatic animals can move from one water body to another through rivers and streams.
Animal:
Animals are perhaps the most important agents of dispersal. Many plants produce fruits and seeds that are eaten by animals. These fruits and seeds pass through the digestive system of animals and are deposited in their droppings. This helps in the dispersal of seeds to new locations. Similarly, some animals like birds and bats are important pollinators for many plants.
All of these:
All the options given in the question are agents of dispersal. Air, water, and animals play a crucial role in the movement of organisms from one place to another. Dispersal helps in the survival and growth of many species by enabling them to colonize new habitats and avoid competition with other organisms.
In conclusion, the correct answer to the question is option 'D', i.e., all of these - air, water, and animals - are agents of dispersal.
Dispersal is the movement of organisms from one place to another. It is important for the survival and growth of many species. There are several agents of dispersal that help organisms move from one place to another. The options given in the question are:
a) Air
b) Water
c) Animal
Let us discuss each of these agents of dispersal in detail.
Air:
Air is a very important agent of dispersal for many plants and animals. Wind can carry seeds, fruits, and pollen grains to distant places. For example, dandelion seeds have feathery structures that help them float in the air. Similarly, many trees produce winged fruits that can be carried away by the wind.
Water:
Water is another important agent of dispersal. Many aquatic plants and animals use water to move from one place to another. For example, some plants produce seeds that can float on water. Similarly, fish and other aquatic animals can move from one water body to another through rivers and streams.
Animal:
Animals are perhaps the most important agents of dispersal. Many plants produce fruits and seeds that are eaten by animals. These fruits and seeds pass through the digestive system of animals and are deposited in their droppings. This helps in the dispersal of seeds to new locations. Similarly, some animals like birds and bats are important pollinators for many plants.
All of these:
All the options given in the question are agents of dispersal. Air, water, and animals play a crucial role in the movement of organisms from one place to another. Dispersal helps in the survival and growth of many species by enabling them to colonize new habitats and avoid competition with other organisms.
In conclusion, the correct answer to the question is option 'D', i.e., all of these - air, water, and animals - are agents of dispersal.
Which among the following can be grown from the stem of a plant?- a)Carrot
- b)Radish
- c)Turnip
- d)Potato
- e)None of these
Correct answer is option 'D'. Can you explain this answer?
Which among the following can be grown from the stem of a plant?
a)
Carrot
b)
Radish
c)
Turnip
d)
Potato
e)
None of these
|
Anuj Mukherjee answered |
**Overview:**
The stem of a plant plays a crucial role in supporting and transporting nutrients throughout the plant. While some plants can be grown from stem cuttings, others cannot. In this case, the correct answer is option D - Potato. Let's explore why.
**Explanation:**
**1. Carrot:**
Carrots cannot be grown from the stem of a plant. Carrots are root vegetables, which means they are grown from the taproot, not the stem.
**2. Radish:**
Similar to carrots, radishes are root vegetables and cannot be grown from the stem of a plant. They are cultivated from the swollen taproot.
**3. Turnip:**
Turnips are also root vegetables and cannot be grown from the stem of a plant. The edible part of the turnip is the swollen taproot.
**4. Potato:**
Potatoes can be grown from the stem of a plant. In fact, potatoes are typically grown from pieces of the stem known as "seed potatoes." These seed potatoes are small pieces of mature potato tubers that contain buds called "eyes." When planted in soil, the eyes sprout and produce new stems and roots, eventually forming a new potato plant.
**5. None of these:**
This option is incorrect because, as explained above, potatoes can indeed be grown from the stem of a plant. Therefore, the correct answer is not "None of these."
In conclusion, out of the given options, only potatoes can be grown from the stem of a plant. Carrots, radishes, and turnips are root vegetables and are grown from the taproot, not the stem.
The stem of a plant plays a crucial role in supporting and transporting nutrients throughout the plant. While some plants can be grown from stem cuttings, others cannot. In this case, the correct answer is option D - Potato. Let's explore why.
**Explanation:**
**1. Carrot:**
Carrots cannot be grown from the stem of a plant. Carrots are root vegetables, which means they are grown from the taproot, not the stem.
**2. Radish:**
Similar to carrots, radishes are root vegetables and cannot be grown from the stem of a plant. They are cultivated from the swollen taproot.
**3. Turnip:**
Turnips are also root vegetables and cannot be grown from the stem of a plant. The edible part of the turnip is the swollen taproot.
**4. Potato:**
Potatoes can be grown from the stem of a plant. In fact, potatoes are typically grown from pieces of the stem known as "seed potatoes." These seed potatoes are small pieces of mature potato tubers that contain buds called "eyes." When planted in soil, the eyes sprout and produce new stems and roots, eventually forming a new potato plant.
**5. None of these:**
This option is incorrect because, as explained above, potatoes can indeed be grown from the stem of a plant. Therefore, the correct answer is not "None of these."
In conclusion, out of the given options, only potatoes can be grown from the stem of a plant. Carrots, radishes, and turnips are root vegetables and are grown from the taproot, not the stem.
What would you plant in soil to get a new rose plant in your garden?- a)Bud
- b)Stem
- c)Leaves
- d)Root
Correct answer is option 'B'. Can you explain this answer?
What would you plant in soil to get a new rose plant in your garden?
a)
Bud
b)
Stem
c)
Leaves
d)
Root
|
Rohit Chawla answered |
Planting a New Rose Plant in Your Garden
To get a new rose plant in your garden, you would need to plant a stem of an existing rose plant. Here are the steps to follow:
Step 1: Choose the Right Stem
Choose a stem that is healthy, green, and at least 6 inches long. Make sure it has no flowers or buds.
Step 2: Prepare the Soil
Dig a hole in the soil that is about 6 inches deep and wide. Mix in some compost or organic matter to enrich the soil.
Step 3: Cut the Stem
Using a sharp knife or pruning shears, cut the stem at a 45-degree angle just below a leaf node. Remove any leaves or thorns from the bottom half of the stem.
Step 4: Plant the Stem
Insert the stem into the hole in the soil, making sure the bottom half of the stem is buried. Press the soil around the stem to make it firm.
Step 5: Water the Plant
Water the plant thoroughly after planting. Keep the soil moist but not waterlogged.
Step 6: Care for the Plant
Provide the plant with enough sunlight, water, and nutrients to help it grow. Prune the plant regularly to promote healthy growth.
By following these steps, you can successfully plant a new rose plant in your garden and enjoy its beautiful blooms.
To get a new rose plant in your garden, you would need to plant a stem of an existing rose plant. Here are the steps to follow:
Step 1: Choose the Right Stem
Choose a stem that is healthy, green, and at least 6 inches long. Make sure it has no flowers or buds.
Step 2: Prepare the Soil
Dig a hole in the soil that is about 6 inches deep and wide. Mix in some compost or organic matter to enrich the soil.
Step 3: Cut the Stem
Using a sharp knife or pruning shears, cut the stem at a 45-degree angle just below a leaf node. Remove any leaves or thorns from the bottom half of the stem.
Step 4: Plant the Stem
Insert the stem into the hole in the soil, making sure the bottom half of the stem is buried. Press the soil around the stem to make it firm.
Step 5: Water the Plant
Water the plant thoroughly after planting. Keep the soil moist but not waterlogged.
Step 6: Care for the Plant
Provide the plant with enough sunlight, water, and nutrients to help it grow. Prune the plant regularly to promote healthy growth.
By following these steps, you can successfully plant a new rose plant in your garden and enjoy its beautiful blooms.
Dispersal of seeds is important for plant because(i) To avoid over-crowding, which results in weak plants.
(ii) To prevent seeds being dependent on parent plant
(iii) To ensure the plants of a particular type spread to new area- a)(i) only
- b)(i) and (ii) only
- c)(i), (ii) and (iii)
- d)(i) and (iii) only
Correct answer is option 'C'. Can you explain this answer?
Dispersal of seeds is important for plant because
(i) To avoid over-crowding, which results in weak plants.
(ii) To prevent seeds being dependent on parent plant
(iii) To ensure the plants of a particular type spread to new area
(ii) To prevent seeds being dependent on parent plant
(iii) To ensure the plants of a particular type spread to new area
a)
(i) only
b)
(i) and (ii) only
c)
(i), (ii) and (iii)
d)
(i) and (iii) only
|
Yashina Kapoor answered |
- Avoid Over-Crowding: Dispersal prevents competition for resources like sunlight, water, and nutrients, promoting healthier growth.
- Independence from Parent Plant: Seeds dispersed away from the parent plant reduce resource competition and avoid diseases and pests that may affect the parent plant.
- Spread to New Areas: Dispersal allows plants to colonize new areas, increasing their distribution and genetic diversity, which enhances their ability to adapt to changing environments.
Thus, the correct answer is C: (i), (ii), and (iii).
Classify the given crops in Rabi and Kharif(i) Wheat
(ii) Maize R-Rabi
(iii) Bajra K-Kharif
(iv) Gram- a)(i) - R, (ii) - K, (iii) - K, (iv) - R
- b)(i) - K, (ii) - K, (iii) - K, (iv) - R
- c)(i) - R, (ii) - R, (iii) - K, (iv) - K
- d)(i) - K, (ii) - K, (iii) - R, (iv) - R
Correct answer is option 'A'. Can you explain this answer?
Classify the given crops in Rabi and Kharif
(i) Wheat
(ii) Maize R-Rabi
(iii) Bajra K-Kharif
(iv) Gram
(ii) Maize R-Rabi
(iii) Bajra K-Kharif
(iv) Gram
a)
(i) - R, (ii) - K, (iii) - K, (iv) - R
b)
(i) - K, (ii) - K, (iii) - K, (iv) - R
c)
(i) - R, (ii) - R, (iii) - K, (iv) - K
d)
(i) - K, (ii) - K, (iii) - R, (iv) - R
|
Saikat Chavan answered |
Classification of Crops in Rabi and Kharif
Rabi crops are sown in the winter season and harvested in the spring season. Kharif crops are sown in the rainy season and harvested in the autumn season. Let's classify the given crops:
(i) Wheat - Rabi
(ii) Maize - Rabi
(iii) Bajra - Kharif
(iv) Gram - Rabi
Explanation:
- Wheat and Maize are winter crops and require cool climate conditions for their growth. Hence, they are classified as Rabi crops.
- Bajra, on the other hand, requires warm and humid weather conditions for its growth. It is sown in the rainy season and hence, classified as Kharif crop.
- Gram can be sown in both Rabi and Kharif seasons, but it is mainly a Rabi crop. It is sown in October-November and harvested in February-March.
Therefore, the correct answer is option 'A' - (i) - Rabi, (ii) - Kharif, (iii) - Kharif, (iv) - Rabi.
Rabi crops are sown in the winter season and harvested in the spring season. Kharif crops are sown in the rainy season and harvested in the autumn season. Let's classify the given crops:
(i) Wheat - Rabi
(ii) Maize - Rabi
(iii) Bajra - Kharif
(iv) Gram - Rabi
Explanation:
- Wheat and Maize are winter crops and require cool climate conditions for their growth. Hence, they are classified as Rabi crops.
- Bajra, on the other hand, requires warm and humid weather conditions for its growth. It is sown in the rainy season and hence, classified as Kharif crop.
- Gram can be sown in both Rabi and Kharif seasons, but it is mainly a Rabi crop. It is sown in October-November and harvested in February-March.
Therefore, the correct answer is option 'A' - (i) - Rabi, (ii) - Kharif, (iii) - Kharif, (iv) - Rabi.
Which of the following plants reproduce through suckers?- a)Mint
- b)Strawberry
- c)Pine tree
- d)Hibiscus
Correct answer is option 'A'. Can you explain this answer?
a)
Mint
b)
Strawberry
c)
Pine tree
d)
Hibiscus
|
Torcia Education answered |
Suckers are underground stems that grow horizontally and then come up to form new plants. Mint is an example of a plant that reproduces using suckers, whereas strawberries use runners for propagation. Hence, Option A is the correct answer.
Process of scattering of seeds away from the parent plant:- a)Germination
- b)Dispersal
- c)Protection
- d)Agriculture
- e)None of these
Correct answer is option 'B'. Can you explain this answer?
Process of scattering of seeds away from the parent plant:
a)
Germination
b)
Dispersal
c)
Protection
d)
Agriculture
e)
None of these
|
Rohini Seth answered |
Process of scattering of seeds away from the parent plant:
1. Germination:
- Germination is the process by which a seed grows into a new plant.
- It begins when the seed absorbs water and the embryo inside the seed starts to grow.
- The root emerges first, followed by the shoot, which grows towards the sunlight.
2. Dispersal:
- Dispersal is the process of scattering seeds away from the parent plant to new locations.
- This is important for the survival and growth of plant species as it helps in reducing competition for resources.
- There are various mechanisms of seed dispersal, including wind, water, animals, and self-dispersal.
3. Protection:
- Plants have evolved different strategies to protect their seeds during dispersal.
- Some plants produce fruits that are attractive to animals, which eat the fruit and then disperse the seeds through their droppings.
- Other plants have seeds that are adapted for wind dispersal, such as having wings or being lightweight.
4. Agriculture:
- Agriculture is the practice of cultivating plants for food, fiber, medicinal plants, and other products.
- While agriculture involves the intentional planting of seeds, it is not part of the natural process of seed dispersal away from the parent plant.
5. None of these:
- This option is incorrect as seed dispersal is a natural process that is essential for the survival and diversity of plant species.
1. Germination:
- Germination is the process by which a seed grows into a new plant.
- It begins when the seed absorbs water and the embryo inside the seed starts to grow.
- The root emerges first, followed by the shoot, which grows towards the sunlight.
2. Dispersal:
- Dispersal is the process of scattering seeds away from the parent plant to new locations.
- This is important for the survival and growth of plant species as it helps in reducing competition for resources.
- There are various mechanisms of seed dispersal, including wind, water, animals, and self-dispersal.
3. Protection:
- Plants have evolved different strategies to protect their seeds during dispersal.
- Some plants produce fruits that are attractive to animals, which eat the fruit and then disperse the seeds through their droppings.
- Other plants have seeds that are adapted for wind dispersal, such as having wings or being lightweight.
4. Agriculture:
- Agriculture is the practice of cultivating plants for food, fiber, medicinal plants, and other products.
- While agriculture involves the intentional planting of seeds, it is not part of the natural process of seed dispersal away from the parent plant.
5. None of these:
- This option is incorrect as seed dispersal is a natural process that is essential for the survival and diversity of plant species.
phospholipids are esters of glycerol with- a)two carboxylic acid residues and one phosphate group
- b)one carboxylic acid residue and two phosphate groups
- c)three phosphate groups
- d)three carboxylic acid residues
Correct answer is option 'A'. Can you explain this answer?
a)
two carboxylic acid residues and one phosphate group
b)
one carboxylic acid residue and two phosphate groups
c)
three phosphate groups
d)
three carboxylic acid residues
|
Mansi Deshpande answered |
Phospholipids are a class of lipids that are structurally similar to triglycerides, except that one of the fatty acid chains is replaced by a phosphate group. They are a major component of cell membranes and play a crucial role in maintaining the integrity of the membrane.
Structure of Phospholipids:
Phospholipids are esters of glycerol, a 3-carbon alcohol, with two fatty acid chains and a phosphate group. They have a hydrophilic (water-loving) head and a hydrophobic (water-fearing) tail. The hydrophilic head contains a phosphate group and is polar, while the hydrophobic tail consists of two fatty acid chains and is nonpolar. This structure allows phospholipids to form a bilayer in aqueous solutions, such as cell membranes.
Esters of Glycerol with Two Carboxylic Acid Residues and One Phosphate Group:
The correct answer is option 'A', which states that phospholipids are esters of glycerol with two carboxylic acid residues and one phosphate group. This means that two of the hydroxyl groups (-OH) on the glycerol molecule are esterified with fatty acid chains, while the third hydroxyl group is esterified with a phosphate group. The carboxylic acid residues are derived from the fatty acids, which are long-chain carboxylic acids.
Conclusion:
In summary, phospholipids are esters of glycerol with two fatty acid chains and a phosphate group. They have a hydrophilic head and a hydrophobic tail, which allows them to form a bilayer in aqueous solutions. The correct answer to the given question is option 'A', which states that phospholipids are esters of glycerol with two carboxylic acid residues and one phosphate group.
Structure of Phospholipids:
Phospholipids are esters of glycerol, a 3-carbon alcohol, with two fatty acid chains and a phosphate group. They have a hydrophilic (water-loving) head and a hydrophobic (water-fearing) tail. The hydrophilic head contains a phosphate group and is polar, while the hydrophobic tail consists of two fatty acid chains and is nonpolar. This structure allows phospholipids to form a bilayer in aqueous solutions, such as cell membranes.
Esters of Glycerol with Two Carboxylic Acid Residues and One Phosphate Group:
The correct answer is option 'A', which states that phospholipids are esters of glycerol with two carboxylic acid residues and one phosphate group. This means that two of the hydroxyl groups (-OH) on the glycerol molecule are esterified with fatty acid chains, while the third hydroxyl group is esterified with a phosphate group. The carboxylic acid residues are derived from the fatty acids, which are long-chain carboxylic acids.
Conclusion:
In summary, phospholipids are esters of glycerol with two fatty acid chains and a phosphate group. They have a hydrophilic head and a hydrophobic tail, which allows them to form a bilayer in aqueous solutions. The correct answer to the given question is option 'A', which states that phospholipids are esters of glycerol with two carboxylic acid residues and one phosphate group.
State whether the following statement is True or False.Some plants can make new plants from their roots, stems, or leaves without using seeds.- a)True
- b)False
Correct answer is option 'A'. Can you explain this answer?
State whether the following statement is True or False.
Some plants can make new plants from their roots, stems, or leaves without using seeds.
a)
True
b)
False
|
Pragati Kaur answered |
Understanding Plant Reproduction
Plants have unique ways of reproducing, and one of the fascinating methods is called vegetative reproduction. This process allows some plants to create new individuals from their roots, stems, or leaves without the need for seeds.
Key Points about Vegetative Reproduction:
- Types of Vegetative Structures:
- Roots: Certain plants like dandelions can produce new shoots from their roots.
- Stems: Plants such as strawberries use runners (stolons) to grow new plants.
- Leaves: Some plants, like the African violet, can grow new plants from leaf cuttings.
- Advantages of This Method:
- Speed: Vegetative reproduction can be faster than seed reproduction.
- Genetic Uniformity: The new plants are clones of the parent, ensuring desired traits are preserved.
- Survival: This method can help plants thrive in environments where seed production might be challenging.
- Examples of Plants:
- Potato: Grows new plants from tubers, which are modified stems.
- Bamboo: Can spread through underground rhizomes, giving rise to new shoots.
Conclusion
The ability of some plants to reproduce without seeds highlights their adaptability and resilience in various environments. This method, known as vegetative reproduction, is indeed a true statement, making the answer to the question true. Such fascinating reproductive strategies are crucial for understanding plant biology and ecology.
Plants have unique ways of reproducing, and one of the fascinating methods is called vegetative reproduction. This process allows some plants to create new individuals from their roots, stems, or leaves without the need for seeds.
Key Points about Vegetative Reproduction:
- Types of Vegetative Structures:
- Roots: Certain plants like dandelions can produce new shoots from their roots.
- Stems: Plants such as strawberries use runners (stolons) to grow new plants.
- Leaves: Some plants, like the African violet, can grow new plants from leaf cuttings.
- Advantages of This Method:
- Speed: Vegetative reproduction can be faster than seed reproduction.
- Genetic Uniformity: The new plants are clones of the parent, ensuring desired traits are preserved.
- Survival: This method can help plants thrive in environments where seed production might be challenging.
- Examples of Plants:
- Potato: Grows new plants from tubers, which are modified stems.
- Bamboo: Can spread through underground rhizomes, giving rise to new shoots.
Conclusion
The ability of some plants to reproduce without seeds highlights their adaptability and resilience in various environments. This method, known as vegetative reproduction, is indeed a true statement, making the answer to the question true. Such fascinating reproductive strategies are crucial for understanding plant biology and ecology.
Which among the following has wings on seeds which help it to get carried away by the wind?- a)Coconut
- b)Mango
- c)Hiptage
- d)Papaya
- e)None of these
Correct answer is option 'C'. Can you explain this answer?
Which among the following has wings on seeds which help it to get carried away by the wind?
a)
Coconut
b)
Mango
c)
Hiptage
d)
Papaya
e)
None of these
|
|
Harsh Malik answered |
Explanation:
Hiptage:
Hiptage is the plant among the options given that has wings on its seeds. These wings help the seeds to get carried away by the wind, aiding in their dispersal over long distances.
Coconut, Mango, and Papaya:
Coconut, mango, and papaya do not have wings on their seeds. These plants rely on other methods for seed dispersal such as animals eating the fruit and spreading the seeds through their droppings.
Seed Dispersal:
Seed dispersal is a crucial process in the lifecycle of plants as it helps in the colonization of new areas and reduces competition among offspring. Various methods of seed dispersal include wind, animals, water, and explosion.
Wind Dispersal:
Plants with winged seeds like hiptage utilize wind dispersal. The wings create a larger surface area, allowing the seeds to be carried away by even a gentle breeze.
Importance of Seed Dispersal:
Seed dispersal increases the chances of plants finding suitable habitats for growth and survival. It also helps in genetic diversity by preventing inbreeding.
In conclusion, among the options given, hiptage is the plant with wings on its seeds that aid in wind dispersal. This mechanism allows the seeds to travel far from the parent plant, increasing the chances of successful germination and growth in new locations.
Which part of the flower is responsible for producing pollen?- a)Sepals
- b)Petals
- c)Stamen
- d)Pistil
Correct answer is option 'C'. Can you explain this answer?
a)
Sepals
b)
Petals
c)
Stamen
d)
Pistil
|
Learning Education answered |
The stamen is the male part of the flower responsible for producing pollen. It consists of a filament that supports an anther containing pollen grains. Pollen is essential for the process of pollination, which leads to fertilization and the production of seeds.
Which among the following plants can be grown from the roots of a plant?- a)Potato
- b)Ginger
- c)Sweet potato
- d)Sugarcane
- e)None of these
Correct answer is option 'C'. Can you explain this answer?
Which among the following plants can be grown from the roots of a plant?
a)
Potato
b)
Ginger
c)
Sweet potato
d)
Sugarcane
e)
None of these
|
|
Harshitha Singh answered |
Plants that can be Grown from Roots
Sweet potato is the only option among the given plants that can be grown from the roots of a plant. This is because sweet potato is a root vegetable, and it is propagated by planting the vine cuttings or slips, which have sprouted roots.
Propagation of Sweet Potato
Sweet potato propagation involves the following steps:
1. Selecting Roots: The roots of the sweet potato plant are selected for propagation.
2. Sprouting Roots: The selected roots are kept in a warm, humid place to sprout roots.
3. Cutting Slips: Once the roots have sprouted, they are cut into slips, which are approximately 6-8 inches long.
4. Planting Slips: The slips are then planted in a well-draining soil, and they are covered with a layer of mulch.
5. Watering: The planted slips are watered regularly, and they should be kept moist.
6. Harvesting: The sweet potatoes are ready for harvest after about 100-120 days of planting.
Conclusion
In conclusion, sweet potato is the only option among the given plants that can be grown from the roots of a plant. Sweet potato propagation involves selecting the roots, sprouting the roots, cutting slips, planting the slips, watering, and harvesting.
Sweet potato is the only option among the given plants that can be grown from the roots of a plant. This is because sweet potato is a root vegetable, and it is propagated by planting the vine cuttings or slips, which have sprouted roots.
Propagation of Sweet Potato
Sweet potato propagation involves the following steps:
1. Selecting Roots: The roots of the sweet potato plant are selected for propagation.
2. Sprouting Roots: The selected roots are kept in a warm, humid place to sprout roots.
3. Cutting Slips: Once the roots have sprouted, they are cut into slips, which are approximately 6-8 inches long.
4. Planting Slips: The slips are then planted in a well-draining soil, and they are covered with a layer of mulch.
5. Watering: The planted slips are watered regularly, and they should be kept moist.
6. Harvesting: The sweet potatoes are ready for harvest after about 100-120 days of planting.
Conclusion
In conclusion, sweet potato is the only option among the given plants that can be grown from the roots of a plant. Sweet potato propagation involves selecting the roots, sprouting the roots, cutting slips, planting the slips, watering, and harvesting.
What are rhizomes in plants?- a)Swollen parts with nodes or eyes
- b)Modified underground stems
- c)Lightweight and wing-shaped seeds
- d)Protective coating of seeds
Correct answer is option 'B'. Can you explain this answer?
a)
Swollen parts with nodes or eyes
b)
Modified underground stems
c)
Lightweight and wing-shaped seeds
d)
Protective coating of seeds
|
Rutuja Yadav answered |
What are Rhizomes?
Rhizomes are specialized structures found in certain plants. They play a crucial role in plant growth and reproduction.
Definition of Rhizomes
- Rhizomes are modified underground stems.
- They grow horizontally beneath the soil surface.
Characteristics of Rhizomes
- Nodes and Internodes: Rhizomes have nodes, which are points where leaves or shoots can grow. They also have internodes, the sections between the nodes.
- Storage Organs: They store nutrients and energy, allowing the plant to survive during adverse conditions, such as winter or drought.
- Growth and Propagation: Rhizomes can produce new shoots and roots at their nodes, enabling the plant to spread and colonize new areas.
Examples of Plants with Rhizomes
- Ginger: The edible part of ginger is a rhizome, which is used in cooking and traditional medicine.
- Bamboo: Many bamboo species grow through rhizomatic networks, allowing them to thrive and spread rapidly.
- Iris: This flowering plant uses rhizomes to propagate and create new plants.
Importance of Rhizomes
- Vegetative Reproduction: Rhizomes allow plants to reproduce without seeds, making them resilient and adaptable.
- Soil Stabilization: They help prevent soil erosion by anchoring the soil with their root systems.
In summary, rhizomes are essential for the growth, survival, and reproduction of certain plants, highlighting their significance in the plant kingdom.
Rhizomes are specialized structures found in certain plants. They play a crucial role in plant growth and reproduction.
Definition of Rhizomes
- Rhizomes are modified underground stems.
- They grow horizontally beneath the soil surface.
Characteristics of Rhizomes
- Nodes and Internodes: Rhizomes have nodes, which are points where leaves or shoots can grow. They also have internodes, the sections between the nodes.
- Storage Organs: They store nutrients and energy, allowing the plant to survive during adverse conditions, such as winter or drought.
- Growth and Propagation: Rhizomes can produce new shoots and roots at their nodes, enabling the plant to spread and colonize new areas.
Examples of Plants with Rhizomes
- Ginger: The edible part of ginger is a rhizome, which is used in cooking and traditional medicine.
- Bamboo: Many bamboo species grow through rhizomatic networks, allowing them to thrive and spread rapidly.
- Iris: This flowering plant uses rhizomes to propagate and create new plants.
Importance of Rhizomes
- Vegetative Reproduction: Rhizomes allow plants to reproduce without seeds, making them resilient and adaptable.
- Soil Stabilization: They help prevent soil erosion by anchoring the soil with their root systems.
In summary, rhizomes are essential for the growth, survival, and reproduction of certain plants, highlighting their significance in the plant kingdom.
Once the seedling has used up the food in __________, they shrink and fall off.- a)roots
- b)stem
- c)cotyledons
- d)eggs
Correct answer is option 'C'. Can you explain this answer?
Once the seedling has used up the food in __________, they shrink and fall off.
a)
roots
b)
stem
c)
cotyledons
d)
eggs
|
|
Gargi Rane answered |
Understanding Seedling Nutrition
When a seed germinates, it develops into a seedling, which relies on stored nutrients for initial growth. These nutrients are primarily found in a part of the seed called cotyledons.
What are Cotyledons?
- Cotyledons are the first leaves that appear on a seedling.
- They serve as a source of food for the developing plant, providing essential nutrients during early growth stages.
- Depending on the plant type, cotyledons can be either single (monocots) or multiple (dicots).
Role of Cotyledons in Seedling Development
- As the seedling grows, it depletes the food reserves stored in the cotyledons.
- This food is crucial for powering the initial growth, including root and stem development.
- Once the cotyledons have been fully utilized, they can no longer support the seedling.
What Happens Next?
- After the cotyledons are exhausted, the seedling begins to shrink as it relies on its own photosynthesis and nutrient absorption from the soil.
- The cotyledons eventually wither and fall off, signaling that the seedling has transitioned to relying on its true leaves for sustenance.
Conclusion
Understanding the role of cotyledons is essential for recognizing how seedlings grow and develop. Once the cotyledons are used up, they shrink and fall off, marking a crucial phase in the life cycle of the plant.
When a seed germinates, it develops into a seedling, which relies on stored nutrients for initial growth. These nutrients are primarily found in a part of the seed called cotyledons.
What are Cotyledons?
- Cotyledons are the first leaves that appear on a seedling.
- They serve as a source of food for the developing plant, providing essential nutrients during early growth stages.
- Depending on the plant type, cotyledons can be either single (monocots) or multiple (dicots).
Role of Cotyledons in Seedling Development
- As the seedling grows, it depletes the food reserves stored in the cotyledons.
- This food is crucial for powering the initial growth, including root and stem development.
- Once the cotyledons have been fully utilized, they can no longer support the seedling.
What Happens Next?
- After the cotyledons are exhausted, the seedling begins to shrink as it relies on its own photosynthesis and nutrient absorption from the soil.
- The cotyledons eventually wither and fall off, signaling that the seedling has transitioned to relying on its true leaves for sustenance.
Conclusion
Understanding the role of cotyledons is essential for recognizing how seedlings grow and develop. Once the cotyledons are used up, they shrink and fall off, marking a crucial phase in the life cycle of the plant.
In a plant like mushroom, a new plant can be grown from which part of the plant?- a)Stem
- b)Root
- c)Spore
- d)Leaf
- e)None of these
Correct answer is option 'C'. Can you explain this answer?
In a plant like mushroom, a new plant can be grown from which part of the plant?
a)
Stem
b)
Root
c)
Spore
d)
Leaf
e)
None of these
|
|
Sankar Khanna answered |
Spore: The key to new plant growth in mushrooms
- Introduction:
Mushrooms are a type of fungus that belongs to the kingdom Fungi. They have a unique reproductive structure called a spore, which plays a crucial role in the growth of a new plant.
- What is a spore?
A spore is a small, single-celled structure that fungi produce as part of their reproductive process. It is similar to a seed in plants and serves as a means of dispersal. Spores are released by mature mushrooms and are capable of growing into new plants under the right conditions.
- Spore dispersal:
When a mushroom reaches maturity, it releases numerous spores into the surrounding environment. These spores are incredibly lightweight and can be carried by wind, water, or even animals. This dispersal mechanism allows spores to reach new locations and increase the chances of successful reproduction.
- Germination:
Once a spore lands in a suitable environment, it can germinate and grow into a new plant. Germination involves the spore absorbing water and nutrients from its surroundings, causing it to swell and develop a network of hyphae.
- Hyphae formation:
Hyphae are thread-like structures that make up the body of a fungus. They grow and branch out from the germinated spore, forming a network called mycelium. The mycelium absorbs nutrients from the environment and provides support for the growing mushroom.
- Fruiting body formation:
As the mycelium continues to absorb nutrients and grow, it eventually forms a distinct structure known as a fruiting body or mushroom. The fruiting body is the visible part of the mushroom that we commonly recognize and consume.
- Spore production:
Within the fruiting body, specialized structures called basidia produce and release new spores. These spores are then dispersed, continuing the life cycle of the mushroom.
- Conclusion:
In a mushroom, a new plant can be grown from a spore. The spore serves as the starting point for the growth of a mycelium, which eventually develops into a fruiting body that produces more spores. This unique reproductive process allows mushrooms to reproduce and colonize new areas.
- Introduction:
Mushrooms are a type of fungus that belongs to the kingdom Fungi. They have a unique reproductive structure called a spore, which plays a crucial role in the growth of a new plant.
- What is a spore?
A spore is a small, single-celled structure that fungi produce as part of their reproductive process. It is similar to a seed in plants and serves as a means of dispersal. Spores are released by mature mushrooms and are capable of growing into new plants under the right conditions.
- Spore dispersal:
When a mushroom reaches maturity, it releases numerous spores into the surrounding environment. These spores are incredibly lightweight and can be carried by wind, water, or even animals. This dispersal mechanism allows spores to reach new locations and increase the chances of successful reproduction.
- Germination:
Once a spore lands in a suitable environment, it can germinate and grow into a new plant. Germination involves the spore absorbing water and nutrients from its surroundings, causing it to swell and develop a network of hyphae.
- Hyphae formation:
Hyphae are thread-like structures that make up the body of a fungus. They grow and branch out from the germinated spore, forming a network called mycelium. The mycelium absorbs nutrients from the environment and provides support for the growing mushroom.
- Fruiting body formation:
As the mycelium continues to absorb nutrients and grow, it eventually forms a distinct structure known as a fruiting body or mushroom. The fruiting body is the visible part of the mushroom that we commonly recognize and consume.
- Spore production:
Within the fruiting body, specialized structures called basidia produce and release new spores. These spores are then dispersed, continuing the life cycle of the mushroom.
- Conclusion:
In a mushroom, a new plant can be grown from a spore. The spore serves as the starting point for the growth of a mycelium, which eventually develops into a fruiting body that produces more spores. This unique reproductive process allows mushrooms to reproduce and colonize new areas.
Which among the following is a manure?- a)Urea
- b)Superphosphate
- c)Ammonium sulphate
- d)Nitrate
- e)None of these
Correct answer is option 'E'. Can you explain this answer?
Which among the following is a manure?
a)
Urea
b)
Superphosphate
c)
Ammonium sulphate
d)
Nitrate
e)
None of these
|
Rhea shah answered |
Manure refers to organic matter used as fertilizer in agriculture. It is different from chemical fertilizers like urea, superphosphate, ammonium sulphate, and nitrate which are synthetic compounds.
Explanation:
• Organic matter: Manure is derived from animal waste like cow dung, horse manure, and poultry litter. It can also come from plant waste like leaves, grass, and crop residues. These materials are rich in nutrients like nitrogen, phosphorus, and potassium which are essential for plant growth.
• Fertilizer vs. manure: Chemical fertilizers like urea, superphosphate, ammonium sulphate, and nitrate are synthetic compounds that are made in a factory. They are usually made by combining minerals like nitrogen, phosphorus, and potassium in a specific ratio. Manure, on the other hand, is a natural product that is obtained from animal or plant waste.
• Advantages of manure: Manure has several advantages over chemical fertilizers. It is a slow-release fertilizer which means that it releases nutrients slowly over time. This helps to prevent nutrient overload which can damage plants. Manure also improves soil structure and water-holding capacity. It also promotes the growth of beneficial microorganisms in the soil.
• Disadvantages of chemical fertilizers: Chemical fertilizers have several disadvantages. They are expensive and can harm the environment if overused. They can also lead to nutrient depletion in the soil and reduce soil fertility over time. Chemical fertilizers can also harm beneficial microorganisms in the soil.
• Conclusion: In conclusion, manure is a natural product derived from animal or plant waste. It is a valuable source of nutrients for plants and has several advantages over chemical fertilizers.
Explanation:
• Organic matter: Manure is derived from animal waste like cow dung, horse manure, and poultry litter. It can also come from plant waste like leaves, grass, and crop residues. These materials are rich in nutrients like nitrogen, phosphorus, and potassium which are essential for plant growth.
• Fertilizer vs. manure: Chemical fertilizers like urea, superphosphate, ammonium sulphate, and nitrate are synthetic compounds that are made in a factory. They are usually made by combining minerals like nitrogen, phosphorus, and potassium in a specific ratio. Manure, on the other hand, is a natural product that is obtained from animal or plant waste.
• Advantages of manure: Manure has several advantages over chemical fertilizers. It is a slow-release fertilizer which means that it releases nutrients slowly over time. This helps to prevent nutrient overload which can damage plants. Manure also improves soil structure and water-holding capacity. It also promotes the growth of beneficial microorganisms in the soil.
• Disadvantages of chemical fertilizers: Chemical fertilizers have several disadvantages. They are expensive and can harm the environment if overused. They can also lead to nutrient depletion in the soil and reduce soil fertility over time. Chemical fertilizers can also harm beneficial microorganisms in the soil.
• Conclusion: In conclusion, manure is a natural product derived from animal or plant waste. It is a valuable source of nutrients for plants and has several advantages over chemical fertilizers.
The shoot grows ______.- a)Downward
- b)Upward
- c)Left
- d)Right
- e)None of these
Correct answer is option 'B'. Can you explain this answer?
The shoot grows ______.
a)
Downward
b)
Upward
c)
Left
d)
Right
e)
None of these
|
Maulik Chauhan answered |
Why the shoot grows upward?
- Phototropism: Shoots grow upward due to a phenomenon called phototropism. Phototropism is the growth of an organism in response to light. Shoots are positively phototropic, meaning they grow towards light sources.
- Auxin Hormone: The hormone auxin plays a crucial role in phototropism. When light hits a plant, auxin accumulates on the shaded side of the shoot. This causes the cells on the shaded side to elongate, bending the shoot towards the light.
- Maximizing Photosynthesis: By growing upward towards light, shoots can maximize their exposure to sunlight. This is essential for photosynthesis, the process by which plants convert light energy into chemical energy to fuel their growth.
- Competition for Light: In nature, plants often grow close together and compete for sunlight. Growing upward allows shoots to outcompete neighboring plants for light, increasing their chances of survival and reproduction.
- Evolutionary Advantage: Over time, plants that exhibit positive phototropism have a better chance of thriving and passing on their genes to future generations. This evolutionary advantage has led to the widespread phenomenon of shoots growing upward towards light sources.
In conclusion, the shoot grows upward due to phototropism, the role of auxin hormone, the need to maximize photosynthesis, competition for light, and the evolutionary advantage of this growth pattern.
- Phototropism: Shoots grow upward due to a phenomenon called phototropism. Phototropism is the growth of an organism in response to light. Shoots are positively phototropic, meaning they grow towards light sources.
- Auxin Hormone: The hormone auxin plays a crucial role in phototropism. When light hits a plant, auxin accumulates on the shaded side of the shoot. This causes the cells on the shaded side to elongate, bending the shoot towards the light.
- Maximizing Photosynthesis: By growing upward towards light, shoots can maximize their exposure to sunlight. This is essential for photosynthesis, the process by which plants convert light energy into chemical energy to fuel their growth.
- Competition for Light: In nature, plants often grow close together and compete for sunlight. Growing upward allows shoots to outcompete neighboring plants for light, increasing their chances of survival and reproduction.
- Evolutionary Advantage: Over time, plants that exhibit positive phototropism have a better chance of thriving and passing on their genes to future generations. This evolutionary advantage has led to the widespread phenomenon of shoots growing upward towards light sources.
In conclusion, the shoot grows upward due to phototropism, the role of auxin hormone, the need to maximize photosynthesis, competition for light, and the evolutionary advantage of this growth pattern.
Complete the series. Bryophyllum : ____ :: Ginger : Underground stem- a)Root
- b)Leaf
- c)Seed
- d)Spore
- e)None of these
Correct answer is option 'B'. Can you explain this answer?
Complete the series. Bryophyllum : ____ :: Ginger : Underground stem
a)
Root
b)
Leaf
c)
Seed
d)
Spore
e)
None of these
|
Riya Singh answered |
Explanation:
The given analogy is Bryophyllum : Ginger :: ____ : Underground stem.
To solve this analogy, we need to find a similar relationship between the given words.
- Bryophyllum is a type of plant that reproduces through leaves.
- Ginger is a type of plant that reproduces through underground stems called rhizomes.
From this information, we can conclude that the missing term should also be a plant that reproduces through underground stems.
Therefore, the correct answer is option B: Leaf.
This is because just like bryophyllum reproduces through leaves and ginger reproduces through underground stems, there are some plants that reproduce through leaves. These leaves develop adventitious buds that grow into new plants when they come in contact with the soil. This process is called vegetative reproduction.
Hence, the analogy is Bryophyllum : Leaf :: Ginger : Underground stem.
The given analogy is Bryophyllum : Ginger :: ____ : Underground stem.
To solve this analogy, we need to find a similar relationship between the given words.
- Bryophyllum is a type of plant that reproduces through leaves.
- Ginger is a type of plant that reproduces through underground stems called rhizomes.
From this information, we can conclude that the missing term should also be a plant that reproduces through underground stems.
Therefore, the correct answer is option B: Leaf.
This is because just like bryophyllum reproduces through leaves and ginger reproduces through underground stems, there are some plants that reproduce through leaves. These leaves develop adventitious buds that grow into new plants when they come in contact with the soil. This process is called vegetative reproduction.
Hence, the analogy is Bryophyllum : Leaf :: Ginger : Underground stem.
What is the main advantage of vegetative propagation?- a)It requires less water
- b)It produces stronger plants
- c)It is quicker than seed reproduction
- d)It prevents plant diseases
Correct answer is option 'C'. Can you explain this answer?
a)
It requires less water
b)
It produces stronger plants
c)
It is quicker than seed reproduction
d)
It prevents plant diseases
|
Edu Impact answered |
The main advantage of vegetative propagation is that it is quicker than seed reproduction. This method allows plants to grow and reproduce faster, often leading to earlier blooming and fruiting compared to plants grown from seeds. This makes vegetative propagation a valuable technique for gardeners and farmers.
How do ferns and fungi reproduce?- a)Through seeds
- b)Through cones
- c)Through spores
- d)Through flowers
Correct answer is option 'C'. Can you explain this answer?
a)
Through seeds
b)
Through cones
c)
Through spores
d)
Through flowers
|
|
Riya Singh answered |
Ferns and fungi reproduce through spores. Spores are tiny particles that can develop into new plants. In ferns, spores are located underneath the leaves, while in fungi, such as mushrooms and bread mold, spores are released into the air to settle and grow into new organisms.
Seeds of mango are dispersed by:- a)Water
- b)Air
- c)Animals
- d)Explosion
- e)None of these
Correct answer is option 'C'. Can you explain this answer?
Seeds of mango are dispersed by:
a)
Water
b)
Air
c)
Animals
d)
Explosion
e)
None of these
|
Neeraj chauhan answered |
Mango seeds are dispersed by animals, birds, and humans. The flesh of mango fruits are eaten by the animals and birds and the seeds are dropped to the ground.
Which crop protection method involves enclosing the fields to keep out animals?- a)Using pesticides
- b)Using insecticides
- c)Fencing
- d)Irrigation
- e)Harvesting
Correct answer is option 'C'. Can you explain this answer?
a)
Using pesticides
b)
Using insecticides
c)
Fencing
d)
Irrigation
e)
Harvesting
|
|
Riya Singh answered |
Fencing involves enclosing the fields to prevent grazing animals such as goats, cows, and buffaloes from accessing the crops.
Which season is associated with the growth of kharif crops in India?- a)Winter
- b)Spring
- c)Monsoon
- d)Summer
- e)None of these
Correct answer is option 'C'. Can you explain this answer?
Which season is associated with the growth of kharif crops in India?
a)
Winter
b)
Spring
c)
Monsoon
d)
Summer
e)
None of these
|
|
Dipanjan Chatterjee answered |
Understanding Kharif Crops
Kharif crops, also known as monsoon crops, are primarily associated with the rainy season in India. The growth of these crops is closely linked to the onset of the southwest monsoon, which typically begins in June and lasts until September.
Characteristics of Kharif Season
- Rainfall Dependency: Kharif crops thrive on the monsoon rains, making them dependent on adequate rainfall for growth.
- Temperature: This season is characterized by warm temperatures, which are conducive for the growth of various crops.
Common Kharif Crops
- Rice: One of the staple foods in India, rice is a major kharif crop.
- Maize: Known for its versatility, maize is another important kharif crop.
- Pulses: Various types of pulses, such as pigeon pea and black gram, are cultivated during this season.
- Cotton: This cash crop is also grown extensively in the kharif season.
Importance of Kharif Crops
- Food Security: Kharif crops play a significant role in ensuring food security in India.
- Economic Factors: They contribute to the livelihoods of millions of farmers across the country.
In summary, the kharif season, marked by the arrival of the monsoon, is crucial for the growth of numerous crops that are essential for both food and economy. Thus, the correct answer to the question is option 'C', which highlights the monsoon as the season of growth for kharif crops.
Kharif crops, also known as monsoon crops, are primarily associated with the rainy season in India. The growth of these crops is closely linked to the onset of the southwest monsoon, which typically begins in June and lasts until September.
Characteristics of Kharif Season
- Rainfall Dependency: Kharif crops thrive on the monsoon rains, making them dependent on adequate rainfall for growth.
- Temperature: This season is characterized by warm temperatures, which are conducive for the growth of various crops.
Common Kharif Crops
- Rice: One of the staple foods in India, rice is a major kharif crop.
- Maize: Known for its versatility, maize is another important kharif crop.
- Pulses: Various types of pulses, such as pigeon pea and black gram, are cultivated during this season.
- Cotton: This cash crop is also grown extensively in the kharif season.
Importance of Kharif Crops
- Food Security: Kharif crops play a significant role in ensuring food security in India.
- Economic Factors: They contribute to the livelihoods of millions of farmers across the country.
In summary, the kharif season, marked by the arrival of the monsoon, is crucial for the growth of numerous crops that are essential for both food and economy. Thus, the correct answer to the question is option 'C', which highlights the monsoon as the season of growth for kharif crops.
Cotton plant is best grown in ____ soil.- a)Black
- b)Loam
- c)Sandy
- d)Moist
- e)None of these
Correct answer is option 'A'. Can you explain this answer?
Cotton plant is best grown in ____ soil.
a)
Black
b)
Loam
c)
Sandy
d)
Moist
e)
None of these
|
Stoneridge Institute answered |
Black soils are most suitable for the cotton crop hence it is also known as black cotton soil. Besides cotton, the soil is suitable for the cultivation of crops like wheat, groundnut, chillies, tobacco and jowar.
Which plants use layering as a method of reproduction?- a)Jasmine and lemon
- b)Ginger and turmeric
- c)Onions and garlic
- d)Potatoes and carrots
Correct answer is option 'A'. Can you explain this answer?
a)
Jasmine and lemon
b)
Ginger and turmeric
c)
Onions and garlic
d)
Potatoes and carrots
|
Gunjan Lakhani answered |
Layering is a method of plant reproduction used by plants like jasmine and lemon. In layering, the side branches are bent down towards the ground and covered with damp soil, leaving the tip exposed. New roots start to grow from the buried part, eventually forming a new plant.
Which crops grow well in clayey soil with good water retention?- a)Wheat
- b)Rice
- c)Jowar
- d)Cotton
Correct answer is option 'B'. Can you explain this answer?
a)
Wheat
b)
Rice
c)
Jowar
d)
Cotton
|
Rahul Kumar answered |
Rice and jute grow well in clayey soil that has good water retention properties, whereas other crops like wheat, jowar, and cotton prefer different soil types.
What should farmers use to protect their crops from insects?- a)Organic fertilizers
- b)Inorganic fertilizers
- c)Insecticides
- d)Herbicides
- e)None of the above
Correct answer is option 'C'. Can you explain this answer?
a)
Organic fertilizers
b)
Inorganic fertilizers
c)
Insecticides
d)
Herbicides
e)
None of the above
|
|
Rohini Seth answered |
Farmers should use insecticides to protect their crops from insects. However, the overuse of insecticides can be harmful to the soil and human health.
The result of germination of seed is:- a)Fruit
- b)Seedling
- c)Root
- d)Flower
- e)None of these
Correct answer is option 'B'. Can you explain this answer?
The result of germination of seed is:
a)
Fruit
b)
Seedling
c)
Root
d)
Flower
e)
None of these
|
Anand thakur answered |
Germination of Seed:
Germination is the process by which a seed develops into a new plant. It is the process through which a seed starts to grow into a seedling. During germination, the embryo inside the seed develops and gives rise to the primary root (radicle), shoot (plumule), and the first leaves of the new plant.
Result of Germination:
The result of germination of a seed is a seedling. A seedling is the young plant that emerges from the seed after germination. It is the initial stage of growth for a plant.
Explanation:
When a seed is provided with favorable conditions such as water, oxygen, and suitable temperature, it undergoes germination. Germination is a crucial process as it marks the beginning of a new plant's life cycle.
During germination, the seed absorbs water, causing it to swell. This activates the enzymes inside the seed, which trigger various metabolic processes. The first visible sign of germination is the emergence of the radicle or primary root from the seed coat. The radicle anchors the seedling into the soil and absorbs water and nutrients from the soil.
Simultaneously, the plumule or shoot emerges from the seed and grows upwards towards the light. The plumule develops into the stem and leaves of the seedling. As the stem elongates, the first pair of leaves, known as cotyledons, also appear. These cotyledons provide nourishment to the seedling until it can produce its own food through photosynthesis.
The seedling continues to grow and develop into a mature plant with roots, stems, leaves, flowers, and fruits. However, the process of germination itself leads to the formation of a seedling.
Therefore, the correct answer is option B) Seedling. After germination, the seed transforms into a seedling, which is the initial stage of growth for a plant.
Germination is the process by which a seed develops into a new plant. It is the process through which a seed starts to grow into a seedling. During germination, the embryo inside the seed develops and gives rise to the primary root (radicle), shoot (plumule), and the first leaves of the new plant.
Result of Germination:
The result of germination of a seed is a seedling. A seedling is the young plant that emerges from the seed after germination. It is the initial stage of growth for a plant.
Explanation:
When a seed is provided with favorable conditions such as water, oxygen, and suitable temperature, it undergoes germination. Germination is a crucial process as it marks the beginning of a new plant's life cycle.
During germination, the seed absorbs water, causing it to swell. This activates the enzymes inside the seed, which trigger various metabolic processes. The first visible sign of germination is the emergence of the radicle or primary root from the seed coat. The radicle anchors the seedling into the soil and absorbs water and nutrients from the soil.
Simultaneously, the plumule or shoot emerges from the seed and grows upwards towards the light. The plumule develops into the stem and leaves of the seedling. As the stem elongates, the first pair of leaves, known as cotyledons, also appear. These cotyledons provide nourishment to the seedling until it can produce its own food through photosynthesis.
The seedling continues to grow and develop into a mature plant with roots, stems, leaves, flowers, and fruits. However, the process of germination itself leads to the formation of a seedling.
Therefore, the correct answer is option B) Seedling. After germination, the seed transforms into a seedling, which is the initial stage of growth for a plant.
The outer covering that protects the baby plant inside the seed is called:- a)Shoot
- b)Cotyledon
- c)Seed coat
- d)Bud
- e)None of these
Correct answer is option 'C'. Can you explain this answer?
The outer covering that protects the baby plant inside the seed is called:
a)
Shoot
b)
Cotyledon
c)
Seed coat
d)
Bud
e)
None of these
|
|
Prasad Joshi answered |
Seed Coat:
The seed coat is the outer covering of a seed that protects the baby plant inside. It is a tough outer layer that provides protection to the embryo and its food supply. Here is a detailed explanation of the seed coat:
Function:
- The primary function of the seed coat is to protect the embryo from physical damage, desiccation, and pathogens.
- It acts as a barrier against external threats such as pests, diseases, and harsh environmental conditions.
Structure:
- The seed coat is composed of one or more layers of cells that are derived from the outermost layer of the parent plant.
- It can vary in thickness, texture, and color depending on the plant species.
Germination:
- During germination, the seed coat plays a crucial role in regulating the water and gas exchange between the embryo and its environment.
- It may also contain chemicals that inhibit germination until the conditions are favorable for the plant to grow.
Dispersal:
- In addition to protection, the seed coat also aids in the dispersal of seeds. It can be adapted for various dispersal methods such as wind, water, or animals.
- Some seed coats have structures like hooks, wings, or hairs that help in seed dispersal.
Conclusion:
In conclusion, the seed coat is an essential part of the seed that provides protection to the developing embryo and ensures the successful germination and growth of the plant.
The seed coat is the outer covering of a seed that protects the baby plant inside. It is a tough outer layer that provides protection to the embryo and its food supply. Here is a detailed explanation of the seed coat:
Function:
- The primary function of the seed coat is to protect the embryo from physical damage, desiccation, and pathogens.
- It acts as a barrier against external threats such as pests, diseases, and harsh environmental conditions.
Structure:
- The seed coat is composed of one or more layers of cells that are derived from the outermost layer of the parent plant.
- It can vary in thickness, texture, and color depending on the plant species.
Germination:
- During germination, the seed coat plays a crucial role in regulating the water and gas exchange between the embryo and its environment.
- It may also contain chemicals that inhibit germination until the conditions are favorable for the plant to grow.
Dispersal:
- In addition to protection, the seed coat also aids in the dispersal of seeds. It can be adapted for various dispersal methods such as wind, water, or animals.
- Some seed coats have structures like hooks, wings, or hairs that help in seed dispersal.
Conclusion:
In conclusion, the seed coat is an essential part of the seed that provides protection to the developing embryo and ensures the successful germination and growth of the plant.
What is the process of adding nutrients to the soil called?- a)Irrigation
- b)Ploughing
- c)Fertilization
- d)Harvesting
- e)Sowing
Correct answer is option 'C'. Can you explain this answer?
a)
Irrigation
b)
Ploughing
c)
Fertilization
d)
Harvesting
e)
Sowing
|
|
Riya Singh answered |
Fertilization is the process of adding nutrients to the soil to make it richer and support the growth of crops. This can be done using organic or inorganic fertilizers.
Which one among the following is not followed in agriculture?- a)Ploughing
- b)Manuring
- c)Knitting and Weaving
- d)Irrigation
- e)None of these
Correct answer is option 'C'. Can you explain this answer?
Which one among the following is not followed in agriculture?
a)
Ploughing
b)
Manuring
c)
Knitting and Weaving
d)
Irrigation
e)
None of these
|
|
Aryan Joshi answered |
Knitting and Weaving in Agriculture
Ploughing, manuring, and irrigation are essential practices in agriculture to prepare the soil, provide nutrients, and ensure proper water supply for crops. However, knitting and weaving are not practices typically followed in agriculture.
Ploughing
Ploughing involves turning over the soil to prepare it for planting. It helps to loosen the soil, control weeds, and improve aeration.
Manuring
Manuring is the process of adding organic or inorganic materials to the soil to provide essential nutrients for plant growth. This helps to improve soil fertility and crop yield.
Irrigation
Irrigation is the artificial application of water to the soil to ensure that crops receive an adequate supply of water for growth and development. It is crucial, especially in areas where rainfall is insufficient.
Knitting and Weaving
Knitting and weaving are textile-related activities that involve creating fabric or clothing by interlacing yarn or thread. These activities are not directly related to agricultural practices, as they are focused on producing textiles rather than cultivating crops.
In conclusion, while ploughing, manuring, and irrigation are important practices in agriculture, knitting and weaving are not typically followed in the agricultural process.
Ploughing, manuring, and irrigation are essential practices in agriculture to prepare the soil, provide nutrients, and ensure proper water supply for crops. However, knitting and weaving are not practices typically followed in agriculture.
Ploughing
Ploughing involves turning over the soil to prepare it for planting. It helps to loosen the soil, control weeds, and improve aeration.
Manuring
Manuring is the process of adding organic or inorganic materials to the soil to provide essential nutrients for plant growth. This helps to improve soil fertility and crop yield.
Irrigation
Irrigation is the artificial application of water to the soil to ensure that crops receive an adequate supply of water for growth and development. It is crucial, especially in areas where rainfall is insufficient.
Knitting and Weaving
Knitting and weaving are textile-related activities that involve creating fabric or clothing by interlacing yarn or thread. These activities are not directly related to agricultural practices, as they are focused on producing textiles rather than cultivating crops.
In conclusion, while ploughing, manuring, and irrigation are important practices in agriculture, knitting and weaving are not typically followed in the agricultural process.
A particle moving in a straight line covers half the distance with speed of 3m/s. The other half of the distance is covered in two equal time intervals with speed of 4.5 m/s 7.5m/s respectively. The average speed of the particle during this motion is- a)4.0 m/s
- b)5.0 m/s
- c)5.5 m/s
- d)4.8 m/s
Correct answer is option 'A'. Can you explain this answer?
A particle moving in a straight line covers half the
distance with speed of 3m/s. The other half of the
distance is covered in two equal time intervals
with speed of 4.5 m/s 7.5m/s respectively. The
average speed of the particle during this motion is
a)
4.0 m/s
b)
5.0 m/s
c)
5.5 m/s
d)
4.8 m/s
|
Aniket Chawla answered |
Four statements are given about roots of plant.
(i) Roots absorb water from soil
(ii) Roots hold plant firmly in the soil
(iii) Roots absorb minerals from the soil
(iv) Roots make food for the plant
Q. Which of the above statement(s) is /are correct?
- a)(i) only
- b)(i) , (ii) , (iii) only
- c)(ii) and (iii)
- d)(i) and (iii)
Correct answer is option 'B'. Can you explain this answer?
Four statements are given about roots of plant.
(i) Roots absorb water from soil
(ii) Roots hold plant firmly in the soil
(iii) Roots absorb minerals from the soil
(iv) Roots make food for the plant
(ii) Roots hold plant firmly in the soil
(iii) Roots absorb minerals from the soil
(iv) Roots make food for the plant
Q. Which of the above statement(s) is /are correct?
a)
(i) only
b)
(i) , (ii) , (iii) only
c)
(ii) and (iii)
d)
(i) and (iii)
|
|
Yashvi Pillai answered |
Incorrect Statement about Roots of Plant
There are four statements given about roots of plant and we need to find out the incorrect statement among them. The statements are:
(i) Roots absorb water from soil
(ii) Roots hold plant firmly in the soil
(iii) Roots absorb minerals from the soil
(iv) Roots make food for the plant
Out of these statements, the incorrect statement is:
(b) (iv) only - Roots do not make food for the plant. The leaves of the plant make food for the plant through the process of photosynthesis.
Explanation
Let's understand each statement in detail:
(i) Roots absorb water from soil - This statement is correct. Roots absorb water from the soil and transport it to different parts of the plant.
(ii) Roots hold plant firmly in the soil - This statement is also correct. Roots provide support to the plant and hold it firmly in the soil.
(iii) Roots absorb minerals from the soil - This statement is also correct. Roots absorb minerals like nitrogen, phosphorus, and potassium from the soil and transport them to different parts of the plant.
(iv) Roots make food for the plant - This statement is incorrect. Roots do not make food for the plant. The leaves of the plant make food for the plant through the process of photosynthesis.
Therefore, the incorrect statement is (b) (iv) only - Roots make food for the plant.
There are four statements given about roots of plant and we need to find out the incorrect statement among them. The statements are:
(i) Roots absorb water from soil
(ii) Roots hold plant firmly in the soil
(iii) Roots absorb minerals from the soil
(iv) Roots make food for the plant
Out of these statements, the incorrect statement is:
(b) (iv) only - Roots do not make food for the plant. The leaves of the plant make food for the plant through the process of photosynthesis.
Explanation
Let's understand each statement in detail:
(i) Roots absorb water from soil - This statement is correct. Roots absorb water from the soil and transport it to different parts of the plant.
(ii) Roots hold plant firmly in the soil - This statement is also correct. Roots provide support to the plant and hold it firmly in the soil.
(iii) Roots absorb minerals from the soil - This statement is also correct. Roots absorb minerals like nitrogen, phosphorus, and potassium from the soil and transport them to different parts of the plant.
(iv) Roots make food for the plant - This statement is incorrect. Roots do not make food for the plant. The leaves of the plant make food for the plant through the process of photosynthesis.
Therefore, the incorrect statement is (b) (iv) only - Roots make food for the plant.
What happens to the ovules after fertilization in flowering plants?- a)They turn into juice
- b)They become seeds
- c)They form fruits
- d)They dry up
Correct answer is option 'B'. Can you explain this answer?
a)
They turn into juice
b)
They become seeds
c)
They form fruits
d)
They dry up
|
|
Riya Singh answered |
After fertilization in flowering plants, the ovules become seeds. The process begins with pollination, followed by the transfer of pollen to the female part of the flower, leading to fertilization. The fertilized ovules develop into seeds, which can grow into new plants.
Which among the following is incorrect?- a)Use healthy and ripe seeds for sowing.
- b)Add manures to soil to increase production.
- c)Excessive use of fertilizers can improve the soil quality
- d)Irrigate the soil properly.
- e)None of these
Correct answer is option 'C'. Can you explain this answer?
Which among the following is incorrect?
a)
Use healthy and ripe seeds for sowing.
b)
Add manures to soil to increase production.
c)
Excessive use of fertilizers can improve the soil quality
d)
Irrigate the soil properly.
e)
None of these
|
|
Hiral Chatterjee answered |
Explanation:
Statement (a): Use healthy and ripe seeds for sowing
This statement is correct. Using healthy and ripe seeds for sowing ensures better germination and healthy plant growth. Healthy seeds have a higher chance of producing strong and disease-resistant plants.
Statement (b): Add manures to soil to increase production
This statement is correct. Adding manures to the soil improves its fertility and nutrient content. Manures are organic materials that release nutrients gradually, providing a steady supply of nutrients to the plants. This, in turn, enhances plant growth and increases production.
Statement (c): Excessive use of fertilizers can improve the soil quality
This statement is incorrect. Excessive use of fertilizers can actually harm the soil quality. While fertilizers provide essential nutrients to the plants, excessive use can lead to nutrient imbalances, soil acidification, and environmental pollution. It can also negatively affect soil microorganisms and beneficial soil organisms, disrupting the natural balance of the soil ecosystem.
Statement (d): Irrigate the soil properly
This statement is correct. Proper irrigation is crucial for the healthy growth of plants. It ensures that plants receive an adequate supply of water, which is essential for various physiological processes like photosynthesis, nutrient uptake, and transpiration. Insufficient or excessive watering can lead to plant stress, wilting, and reduced crop yields.
Conclusion:
Among the given statements, statement (c) is incorrect. Excessive use of fertilizers can have negative impacts on soil quality and the environment.
Statement (a): Use healthy and ripe seeds for sowing
This statement is correct. Using healthy and ripe seeds for sowing ensures better germination and healthy plant growth. Healthy seeds have a higher chance of producing strong and disease-resistant plants.
Statement (b): Add manures to soil to increase production
This statement is correct. Adding manures to the soil improves its fertility and nutrient content. Manures are organic materials that release nutrients gradually, providing a steady supply of nutrients to the plants. This, in turn, enhances plant growth and increases production.
Statement (c): Excessive use of fertilizers can improve the soil quality
This statement is incorrect. Excessive use of fertilizers can actually harm the soil quality. While fertilizers provide essential nutrients to the plants, excessive use can lead to nutrient imbalances, soil acidification, and environmental pollution. It can also negatively affect soil microorganisms and beneficial soil organisms, disrupting the natural balance of the soil ecosystem.
Statement (d): Irrigate the soil properly
This statement is correct. Proper irrigation is crucial for the healthy growth of plants. It ensures that plants receive an adequate supply of water, which is essential for various physiological processes like photosynthesis, nutrient uptake, and transpiration. Insufficient or excessive watering can lead to plant stress, wilting, and reduced crop yields.
Conclusion:
Among the given statements, statement (c) is incorrect. Excessive use of fertilizers can have negative impacts on soil quality and the environment.
Name the crops which are grown from June to October month in India.- a)Rabi crops
- b)Kharif crops
- c)Both [a] and [b]
- d)Either [a] or [b]
- e)one of these
Correct answer is option 'B'. Can you explain this answer?
Name the crops which are grown from June to October month in India.
a)
Rabi crops
b)
Kharif crops
c)
Both [a] and [b]
d)
Either [a] or [b]
e)
one of these
|
|
Riya Singh answered |
Kharif Crops Grown from June to October in India:
Kharif crops are the crops that are sown during the rainy season in India, which generally starts from June and extends till October. These crops require a good amount of water for their growth and development. Here are some of the major Kharif crops grown during this period in India:
1. Paddy (Rice): Rice is the most important Kharif crop in India. It is grown in both irrigated and rain-fed areas.
2. Maize: Maize is another significant Kharif crop that is grown extensively in various parts of the country.
3. Coarse grains: Coarse grains like jowar, bajra, and ragi are also sown during this season.
4. Pulses: Pulses such as pigeon pea (tur or arhar), moong, and urad are grown during the Kharif season.
5. Cotton: Cotton is an important cash crop that is cultivated during this period. It is grown for its fiber.
6. Groundnut: Groundnut is a major oilseed crop grown during the Kharif season.
7. Sugarcane: Sugarcane cultivation is also done during this period. It requires a long period to mature.
8. Vegetables: Various vegetables like brinjal, okra, pumpkin, and cucumber are also grown during this season.
9. Oilseeds: Besides groundnut, other oilseeds like sesame, sunflower, and soybean are also cultivated.
10. Spices: Spices such as turmeric and ginger are also grown during the Kharif season.
It is important to note that the specific crops grown may vary depending on the region and climatic conditions.
Kharif crops are the crops that are sown during the rainy season in India, which generally starts from June and extends till October. These crops require a good amount of water for their growth and development. Here are some of the major Kharif crops grown during this period in India:
1. Paddy (Rice): Rice is the most important Kharif crop in India. It is grown in both irrigated and rain-fed areas.
2. Maize: Maize is another significant Kharif crop that is grown extensively in various parts of the country.
3. Coarse grains: Coarse grains like jowar, bajra, and ragi are also sown during this season.
4. Pulses: Pulses such as pigeon pea (tur or arhar), moong, and urad are grown during the Kharif season.
5. Cotton: Cotton is an important cash crop that is cultivated during this period. It is grown for its fiber.
6. Groundnut: Groundnut is a major oilseed crop grown during the Kharif season.
7. Sugarcane: Sugarcane cultivation is also done during this period. It requires a long period to mature.
8. Vegetables: Various vegetables like brinjal, okra, pumpkin, and cucumber are also grown during this season.
9. Oilseeds: Besides groundnut, other oilseeds like sesame, sunflower, and soybean are also cultivated.
10. Spices: Spices such as turmeric and ginger are also grown during the Kharif season.
It is important to note that the specific crops grown may vary depending on the region and climatic conditions.
In some plants, there are different parts of a plant, seed, stem, leaf and spore. Which of the following is a correct statement regarding them?- a)All rely on stored food for growth
- b)Don't need air, water and sunlight to grow
- c)Have to disperse for growth
- d)Can grow into new plant
Correct answer is option 'D'. Can you explain this answer?
In some plants, there are different parts of a plant, seed, stem, leaf and spore. Which of the following is a correct statement regarding them?
a)
All rely on stored food for growth
b)
Don't need air, water and sunlight to grow
c)
Have to disperse for growth
d)
Can grow into new plant
|
|
Edu Impact answered |
The different parts of a plant, such as seeds, stems, leaves, and spores, play important roles in its growth.
- Seeds contain stored food that helps them grow into new plants.
- Stems support the plant and carry water and nutrients.
- Leaves are where the plant makes food using sunlight, air, and water.
- Spores can help the plant spread and grow in new places.
Among these, the correct statement is that they can grow into new plants when given the right conditions.
Crops grown in ____ season are also known as rabi crops.- a)Summer
- b)Autumn
- c)Winter
- d)Spring
- e)None of these
Correct answer is option 'C'. Can you explain this answer?
Crops grown in ____ season are also known as rabi crops.
a)
Summer
b)
Autumn
c)
Winter
d)
Spring
e)
None of these
|
Joselle Fernandes answered |
The crops are grown either with rainwater that has percolated into the ground or using irrigation. Good rain in winter spoils the rabi crops but is good for kharif crops. The major rabi crop in India is wheat, followed by barley, mustard, sesame and peas.
Which of the following is a way of vegetative propagation in plant?- a)Cutting
- b)Budding
- c)Layering
- d)All of these
Correct answer is option 'D'. Can you explain this answer?
Which of the following is a way of vegetative propagation in plant?
a)
Cutting
b)
Budding
c)
Layering
d)
All of these
|
|
Gunjan Lakhani answered |
Vegetative propagation is a method of plant reproduction that does not involve seeds. There are several common techniques, including:
- Cutting: This involves taking a part of the plant, like a stem or leaf, and placing it in soil or water to grow roots.
- Budding: In this process, a new plant grows from a bud on the parent plant. This is often used in grafting.
- Layering: This technique encourages a stem to root while still attached to the parent plant. Once rooted, it can be severed to grow independently.
All of these methods are effective ways of propagating plants without using seeds.
___________ have roots growing from the bottom and green leaves from the top.- a)Chromosome
- b)Rhizome
- c)Bryophyllum
- d)Chonker
Correct answer is option 'B'. Can you explain this answer?
___________ have roots growing from the bottom and green leaves from the top.
a)
Chromosome
b)
Rhizome
c)
Bryophyllum
d)
Chonker
|
|
Rohini Seth answered |
Rhizomes have roots growing from the bottom and green leaves from the top. They are a type of underground stem that allows plants to store nutrients and produce new shoots. Here are some key points about rhizomes:
- They help in vegetative reproduction, allowing plants to spread.
- Rhizomes can grow horizontally, which supports stability in the soil.
- Many plants, such as ginger and bamboo, use rhizomes for growth.
This adaptation is crucial for survival in various environments.
A plant reproduces through its leaves, it could be- a)Sugarcane
- b)Bryophyllum
- c)Banana
- d)Potato
Correct answer is option 'B'. Can you explain this answer?
A plant reproduces through its leaves, it could be
a)
Sugarcane
b)
Bryophyllum
c)
Banana
d)
Potato
|
|
Shalini Iyer answered |
Reproduction Through Leaves in Plants
Plant reproduction can occur through various methods such as seeds, bulbs, runners, and leaves. Reproduction through leaves is a unique method used by some plants, and Bryophyllum is one such plant that reproduces through its leaves.
Bryophyllum Plant
Bryophyllum is a succulent plant that belongs to the Crassulaceae family. It is native to Madagascar but is now found in many parts of the world. It is a very interesting plant because it can reproduce both sexually and asexually. One of the unique ways it reproduces is through its leaves.
Reproduction Through Leaves
Bryophyllum leaves have small plantlets growing on the edges. These plantlets are called bulbils or gemmae. These bulbils have the potential to grow into a new plant when they fall off the mother plant or are separated from it. The bulbils are capable of developing roots and shoots, which help them establish themselves as a new plant.
Advantages of Reproduction Through Leaves
Reproduction through leaves has several advantages for plants, including:
1. Quick propagation: Reproduction through leaves is a faster method of propagation compared to other methods like seed propagation.
2. Survival: Plants that reproduce through leaves have a better chance of survival because they can produce new plants even if the main plant is damaged or dies.
3. Adaptability: Plants that reproduce through leaves can adapt to changing environmental conditions more easily because they can produce new plants that are better suited to the new conditions.
Conclusion
In conclusion, while many plants reproduce through seeds, bulbs, runners, and other methods, Bryophyllum is a unique plant that reproduces through its leaves. This method of reproduction has several advantages for the plant, including quick propagation, survival, and adaptability.
Plant reproduction can occur through various methods such as seeds, bulbs, runners, and leaves. Reproduction through leaves is a unique method used by some plants, and Bryophyllum is one such plant that reproduces through its leaves.
Bryophyllum Plant
Bryophyllum is a succulent plant that belongs to the Crassulaceae family. It is native to Madagascar but is now found in many parts of the world. It is a very interesting plant because it can reproduce both sexually and asexually. One of the unique ways it reproduces is through its leaves.
Reproduction Through Leaves
Bryophyllum leaves have small plantlets growing on the edges. These plantlets are called bulbils or gemmae. These bulbils have the potential to grow into a new plant when they fall off the mother plant or are separated from it. The bulbils are capable of developing roots and shoots, which help them establish themselves as a new plant.
Advantages of Reproduction Through Leaves
Reproduction through leaves has several advantages for plants, including:
1. Quick propagation: Reproduction through leaves is a faster method of propagation compared to other methods like seed propagation.
2. Survival: Plants that reproduce through leaves have a better chance of survival because they can produce new plants even if the main plant is damaged or dies.
3. Adaptability: Plants that reproduce through leaves can adapt to changing environmental conditions more easily because they can produce new plants that are better suited to the new conditions.
Conclusion
In conclusion, while many plants reproduce through seeds, bulbs, runners, and other methods, Bryophyllum is a unique plant that reproduces through its leaves. This method of reproduction has several advantages for the plant, including quick propagation, survival, and adaptability.
____ is a way of dispersal of seeds by bursting of seeds.- a)Harvesting
- b)Explosion
- c)Germination
- d)Agriculture
- e)None of these
Correct answer is option 'B'. Can you explain this answer?
____ is a way of dispersal of seeds by bursting of seeds.
a)
Harvesting
b)
Explosion
c)
Germination
d)
Agriculture
e)
None of these
|
|
Sreemoyee Das answered |
Dispersal of Seeds by Bursting
The correct answer is option 'B' - Explosion.
Explanation:
When it comes to seed dispersal, plants have evolved various mechanisms to ensure the survival and spread of their offspring. One such mechanism is the dispersal of seeds by bursting.
How does seed bursting occur?
Seed bursting occurs when the seed pod or fruit of a plant suddenly bursts open, releasing the seeds forcefully into the surrounding environment. This burst can happen due to various factors, such as changes in temperature, humidity, or physical pressure.
Advantages of seed bursting:
Seed bursting is an effective way for plants to disperse their seeds over larger distances, increasing the chances of successful germination and growth. It helps in colonizing new habitats, reducing competition among offspring, and ensuring genetic diversity.
Examples of plants that disperse seeds by bursting:
1. Impatiens: The Impatiens plant, commonly known as touch-me-not, has seed pods that burst open when touched, flinging the seeds away from the parent plant.
2. Hura crepitans: Also known as the sandbox tree or exploding cigar tree, Hura crepitans has seed pods that explode with a loud noise, scattering the seeds up to 100 feet away.
3. Ecballium elaterium: This plant, commonly known as the squirting cucumber, has fruit that forcefully expels its seeds when the fruit is disturbed or touched.
Significance of seed bursting:
Seed bursting as a dispersal mechanism allows plants to reach new areas, expand their populations, and avoid competition with parent plants. It also increases the chances of finding suitable conditions for growth and survival.
In conclusion, seed dispersal by bursting is an effective strategy employed by certain plants to spread their seeds. This mechanism helps in the colonization of new habitats, genetic diversity, and the survival of plant offspring.
The correct answer is option 'B' - Explosion.
Explanation:
When it comes to seed dispersal, plants have evolved various mechanisms to ensure the survival and spread of their offspring. One such mechanism is the dispersal of seeds by bursting.
How does seed bursting occur?
Seed bursting occurs when the seed pod or fruit of a plant suddenly bursts open, releasing the seeds forcefully into the surrounding environment. This burst can happen due to various factors, such as changes in temperature, humidity, or physical pressure.
Advantages of seed bursting:
Seed bursting is an effective way for plants to disperse their seeds over larger distances, increasing the chances of successful germination and growth. It helps in colonizing new habitats, reducing competition among offspring, and ensuring genetic diversity.
Examples of plants that disperse seeds by bursting:
1. Impatiens: The Impatiens plant, commonly known as touch-me-not, has seed pods that burst open when touched, flinging the seeds away from the parent plant.
2. Hura crepitans: Also known as the sandbox tree or exploding cigar tree, Hura crepitans has seed pods that explode with a loud noise, scattering the seeds up to 100 feet away.
3. Ecballium elaterium: This plant, commonly known as the squirting cucumber, has fruit that forcefully expels its seeds when the fruit is disturbed or touched.
Significance of seed bursting:
Seed bursting as a dispersal mechanism allows plants to reach new areas, expand their populations, and avoid competition with parent plants. It also increases the chances of finding suitable conditions for growth and survival.
In conclusion, seed dispersal by bursting is an effective strategy employed by certain plants to spread their seeds. This mechanism helps in the colonization of new habitats, genetic diversity, and the survival of plant offspring.
Cutting and gathering of ripened crops:- a)Agriculture
- b)Harvesting
- c)Dispersal
- d)Germination
- e)None of these
Correct answer is option 'B'. Can you explain this answer?
Cutting and gathering of ripened crops:
a)
Agriculture
b)
Harvesting
c)
Dispersal
d)
Germination
e)
None of these
|
Pranab Choudhury answered |
Harvesting
Harvesting is the process of cutting and gathering ripened crops from the fields. It is an essential step in agriculture as it marks the culmination of the farming cycle and the transition from the growth phase to the utilization phase of crops. Harvesting involves the removal of mature crops from their plants or trees, ensuring that they are ready for consumption or further processing.
Importance of Harvesting
Harvesting is a crucial activity in agriculture for several reasons:
1. Food Security: Harvesting ensures a steady supply of food for both human and animal consumption. It allows farmers to collect the fruits of their labor and provides sustenance for the population.
2. Economic Value: The harvested crops have economic value as they can be sold in the market, contributing to the income of farmers and the overall economy.
3. Preservation: Harvesting prevents the crops from overripening, decay, or being damaged by pests, weather conditions, or other external factors. It allows for timely collection before any potential losses occur.
4. Seed Collection: Some crops produce seeds that can be collected during the harvesting process. These seeds can be stored and used for future cultivation, ensuring the continuity of the farming cycle.
5. Timing: Harvesting requires careful observation and judgment to determine the right time for reaping the crops. It is essential to ensure that the crops have reached their peak ripeness, maximizing their flavor, nutritional value, and marketability.
Methods of Harvesting
The method of harvesting varies depending on the type of crop. Some common methods include:
1. Manual Harvesting: This involves the use of hand tools like sickles, scythes, or knives to cut crops such as wheat, rice, or maize. It is labor-intensive and requires skilled workers to ensure efficient and careful cutting.
2. Machine Harvesting: Mechanized harvesting involves the use of specialized machines like combine harvesters or fruit harvesters. These machines can cut, gather, and process crops at a faster rate, reducing labor requirements and increasing efficiency.
Conclusion
In conclusion, harvesting is a vital process in agriculture that involves cutting and gathering ripened crops. It ensures food security, economic value, preservation, and the collection of seeds for future cultivation. The method of harvesting can be manual or mechanized, depending on the type of crop. Proper timing and careful execution are essential to maximize the benefits of harvesting and ensure the successful completion of the farming cycle.
Harvesting is the process of cutting and gathering ripened crops from the fields. It is an essential step in agriculture as it marks the culmination of the farming cycle and the transition from the growth phase to the utilization phase of crops. Harvesting involves the removal of mature crops from their plants or trees, ensuring that they are ready for consumption or further processing.
Importance of Harvesting
Harvesting is a crucial activity in agriculture for several reasons:
1. Food Security: Harvesting ensures a steady supply of food for both human and animal consumption. It allows farmers to collect the fruits of their labor and provides sustenance for the population.
2. Economic Value: The harvested crops have economic value as they can be sold in the market, contributing to the income of farmers and the overall economy.
3. Preservation: Harvesting prevents the crops from overripening, decay, or being damaged by pests, weather conditions, or other external factors. It allows for timely collection before any potential losses occur.
4. Seed Collection: Some crops produce seeds that can be collected during the harvesting process. These seeds can be stored and used for future cultivation, ensuring the continuity of the farming cycle.
5. Timing: Harvesting requires careful observation and judgment to determine the right time for reaping the crops. It is essential to ensure that the crops have reached their peak ripeness, maximizing their flavor, nutritional value, and marketability.
Methods of Harvesting
The method of harvesting varies depending on the type of crop. Some common methods include:
1. Manual Harvesting: This involves the use of hand tools like sickles, scythes, or knives to cut crops such as wheat, rice, or maize. It is labor-intensive and requires skilled workers to ensure efficient and careful cutting.
2. Machine Harvesting: Mechanized harvesting involves the use of specialized machines like combine harvesters or fruit harvesters. These machines can cut, gather, and process crops at a faster rate, reducing labor requirements and increasing efficiency.
Conclusion
In conclusion, harvesting is a vital process in agriculture that involves cutting and gathering ripened crops. It ensures food security, economic value, preservation, and the collection of seeds for future cultivation. The method of harvesting can be manual or mechanized, depending on the type of crop. Proper timing and careful execution are essential to maximize the benefits of harvesting and ensure the successful completion of the farming cycle.
A seedling of coconut was growing on a sea shore. Which of the mode of dispersal may be utilized for its dispersal- a)Air
- b)Animal
- c)Explosion
- d)Water
Correct answer is option 'D'. Can you explain this answer?
A seedling of coconut was growing on a sea shore. Which of the mode of dispersal may be utilized for its dispersal
a)
Air
b)
Animal
c)
Explosion
d)
Water
|
Lakshmi Mehta answered |
Dispersal of Coconut Seedlings
Coconut seedlings growing on a sea shore have several modes of dispersal available to them. However, the most suitable mode of dispersal for coconut seedlings in this environment is through water.
Water Dispersal
Coconut seedlings have adapted to disperse through water for several reasons:
1. Buoyancy: Coconut seedlings have a unique buoyancy mechanism that allows them to float in water. Their seeds have a fibrous husk surrounding them, which acts as a flotation device. This enables them to be carried by ocean currents and tides.
2. Coastal currents: The sea shore is constantly exposed to the movement of coastal currents. These currents can carry the coconut seedlings over long distances, allowing them to colonize new areas and increase their chances of survival.
3. Salt tolerance: Coconut seedlings are able to tolerate the saltwater environment they encounter during dispersal. This is because they have specialized mechanisms to prevent excessive salt uptake and maintain their water balance.
4. Suitable germination conditions: Water dispersal ensures that coconut seedlings are deposited in moist environments, which are ideal for their germination and growth. The sea shore provides the necessary moisture for the seedlings to establish themselves and start growing.
Other Modes of Dispersal
While water dispersal is the most effective mode for coconut seedlings on a sea shore, there are other modes of dispersal that may be utilized in different environments:
- Air: Coconut seeds have a lightweight structure that can allow them to be carried by wind over short distances. However, this mode of dispersal is less likely to occur on a sea shore where the wind is influenced by the proximity to the water.
- Animal: Coconut seedlings can also be dispersed by animals, particularly mammals and birds. However, this mode of dispersal is less common on a sea shore as the presence of large mammals and birds may be limited in such an environment.
- Explosion: Some plants disperse their seeds through explosive mechanisms, where the seed pods burst open and scatter the seeds. However, coconut seedlings do not have such explosive mechanisms and therefore, this mode of dispersal is not applicable.
In conclusion, the most suitable mode of dispersal for coconut seedlings growing on a sea shore is through water. This mode allows them to take advantage of ocean currents and tides to disperse over long distances, find suitable germination conditions, and increase their chances of survival.
Coconut seedlings growing on a sea shore have several modes of dispersal available to them. However, the most suitable mode of dispersal for coconut seedlings in this environment is through water.
Water Dispersal
Coconut seedlings have adapted to disperse through water for several reasons:
1. Buoyancy: Coconut seedlings have a unique buoyancy mechanism that allows them to float in water. Their seeds have a fibrous husk surrounding them, which acts as a flotation device. This enables them to be carried by ocean currents and tides.
2. Coastal currents: The sea shore is constantly exposed to the movement of coastal currents. These currents can carry the coconut seedlings over long distances, allowing them to colonize new areas and increase their chances of survival.
3. Salt tolerance: Coconut seedlings are able to tolerate the saltwater environment they encounter during dispersal. This is because they have specialized mechanisms to prevent excessive salt uptake and maintain their water balance.
4. Suitable germination conditions: Water dispersal ensures that coconut seedlings are deposited in moist environments, which are ideal for their germination and growth. The sea shore provides the necessary moisture for the seedlings to establish themselves and start growing.
Other Modes of Dispersal
While water dispersal is the most effective mode for coconut seedlings on a sea shore, there are other modes of dispersal that may be utilized in different environments:
- Air: Coconut seeds have a lightweight structure that can allow them to be carried by wind over short distances. However, this mode of dispersal is less likely to occur on a sea shore where the wind is influenced by the proximity to the water.
- Animal: Coconut seedlings can also be dispersed by animals, particularly mammals and birds. However, this mode of dispersal is less common on a sea shore as the presence of large mammals and birds may be limited in such an environment.
- Explosion: Some plants disperse their seeds through explosive mechanisms, where the seed pods burst open and scatter the seeds. However, coconut seedlings do not have such explosive mechanisms and therefore, this mode of dispersal is not applicable.
In conclusion, the most suitable mode of dispersal for coconut seedlings growing on a sea shore is through water. This mode allows them to take advantage of ocean currents and tides to disperse over long distances, find suitable germination conditions, and increase their chances of survival.
The eyes of potato are:- a)Leaves
- b)Buds
- c)Roots
- d)Flowers
- e)None of these
Correct answer is option 'B'. Can you explain this answer?
The eyes of potato are:
a)
Leaves
b)
Buds
c)
Roots
d)
Flowers
e)
None of these
|
|
Sankar Khanna answered |
The correct answer is option 'B' - Buds.
Explanation:
Potato plants have a unique way of reproducing, and the "eyes" of a potato are actually buds. These buds are small dimples or indentations on the surface of the potato. Each of these buds has the potential to grow into a new potato plant.
Potato plants are propagated through vegetative reproduction, which means that a new plant can be grown from a part of the parent plant. In the case of potatoes, this is usually done using the tubers, which are the underground stems of the plant. The eyes of the potato tuber are the areas where the buds are located.
When a potato tuber is planted in soil, the buds or eyes on the tuber start to sprout and grow. These buds develop into new shoots and eventually give rise to new potato plants. The buds are capable of producing both stems and roots, allowing the new plant to establish itself in the soil.
Importance of Potato Eyes:
The eyes of a potato are essential for the propagation and growth of the plant. They serve as the starting point for the development of new shoots and roots. Without the eyes, the potato tuber would not be able to grow into a new plant.
When planting potatoes, it is important to choose tubers with healthy and well-developed eyes. These eyes indicate that the tuber is viable and capable of producing new growth. Potatoes with a large number of eyes are generally preferred for planting, as they have a higher potential for producing a larger number of plants.
Conclusion:
In conclusion, the eyes of a potato are buds that have the ability to grow into new shoots and roots. These buds are crucial for the propagation and growth of the potato plant. When planting potatoes, it is important to select tubers with healthy and well-developed eyes to ensure successful growth and yield.
Explanation:
Potato plants have a unique way of reproducing, and the "eyes" of a potato are actually buds. These buds are small dimples or indentations on the surface of the potato. Each of these buds has the potential to grow into a new potato plant.
Potato plants are propagated through vegetative reproduction, which means that a new plant can be grown from a part of the parent plant. In the case of potatoes, this is usually done using the tubers, which are the underground stems of the plant. The eyes of the potato tuber are the areas where the buds are located.
When a potato tuber is planted in soil, the buds or eyes on the tuber start to sprout and grow. These buds develop into new shoots and eventually give rise to new potato plants. The buds are capable of producing both stems and roots, allowing the new plant to establish itself in the soil.
Importance of Potato Eyes:
The eyes of a potato are essential for the propagation and growth of the plant. They serve as the starting point for the development of new shoots and roots. Without the eyes, the potato tuber would not be able to grow into a new plant.
When planting potatoes, it is important to choose tubers with healthy and well-developed eyes. These eyes indicate that the tuber is viable and capable of producing new growth. Potatoes with a large number of eyes are generally preferred for planting, as they have a higher potential for producing a larger number of plants.
Conclusion:
In conclusion, the eyes of a potato are buds that have the ability to grow into new shoots and roots. These buds are crucial for the propagation and growth of the potato plant. When planting potatoes, it is important to select tubers with healthy and well-developed eyes to ensure successful growth and yield.
Chapter doubts & questions for Plant Life - Science Class 5 2025 is part of Class 5 exam preparation. The chapters have been prepared according to the Class 5 exam syllabus. The Chapter doubts & questions, notes, tests & MCQs are made for Class 5 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests here.
Chapter doubts & questions of Plant Life - Science Class 5 in English & Hindi are available as part of Class 5 exam.
Download more important topics, notes, lectures and mock test series for Class 5 Exam by signing up for free.
Science Class 5
42 videos|230 docs|45 tests
|
|
© EduRev
|
Education Revolution
|
|
Signup to see your scores
go up
within 7 days!
within 7 days!
Takes less than 10 seconds to signup