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Test : Plant Life - 3 - Class 5 MCQ


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20 Questions MCQ Test Science Class 5 - Test : Plant Life - 3

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Test : Plant Life - 3 - Question 1

Which among the following is a dicot seed?

Detailed Solution for Test : Plant Life - 3 - Question 1

Dicots are plants having two embryonic leaves in one leaf. Besides this, these plants vary in almost all aspects; right from the stem to the roots.

Gram is a dicot seed.

Test : Plant Life - 3 - Question 2

____ is/are also known as seed leaves.

Detailed Solution for Test : Plant Life - 3 - Question 2
Explanation:
The correct answer is B: Cotyledons.
- Cotyledons are also known as seed leaves.
- Cotyledons are part of the embryo within the seed of a plant.
- They are the first leaves to appear during germination and play a crucial role in providing nutrients to the growing seedling.
- Cotyledons can vary in size, shape, and number depending on the plant species.
- They can either remain underground or emerge above the soil surface.
- Cotyledons are usually green and capable of photosynthesis, allowing the seedling to produce its own food until true leaves develop.
- Once the true leaves appear, the cotyledons usually wither and fall off.
- The number and arrangement of cotyledons can be used to classify plants into different groups, such as monocots (one cotyledon) and dicots (two cotyledons).
In summary, cotyledons are the seed leaves of a plant that provide nourishment to the seedling until it can photosynthesize on its own.
Test : Plant Life - 3 - Question 3

Which among the following plants can be grown from the roots of a plant?

Detailed Solution for Test : Plant Life - 3 - Question 3
Plants that can be grown from the roots of a plant:
- Potato: Potatoes are not grown from the roots of a plant. They are grown from the tubers of the potato plant.
- Ginger: Ginger is grown from the rhizomes of the ginger plant, which are underground stems, not roots.
- Sweet potato: Sweet potatoes can be grown from the roots of a plant. When a sweet potato is planted, new roots will develop, and new sweet potatoes will grow from these roots.
- Sugarcane: Sugarcane is not grown from the roots of a plant. It is grown from stem cuttings or pieces of the stalks.
Therefore, the correct answer is option C: Sweet potato.
Test : Plant Life - 3 - Question 4

In a plant like mushroom, a new plant can be grown from which part of the plant?

Detailed Solution for Test : Plant Life - 3 - Question 4
Answer:

A new plant in a mushroom can be grown from the spore of the plant. Here is a detailed explanation:



  • Spore: Spores are the reproductive cells of fungi, including mushrooms. They are produced in large quantities and are dispersed by wind or other means.

  • Growth: When a spore lands in a suitable environment, it can germinate and grow into a new plant. The spore absorbs water and nutrients from its surroundings and develops into a mycelium.

  • Mycelium: The mycelium is a network of thread-like structures called hyphae. It grows underground or within the substrate, such as decaying wood or soil.

  • Fruiting Body: As the mycelium matures, it forms a fruiting body, which is the visible part of the mushroom. This is the part that we typically associate with a mushroom.

  • Spore Production: Within the fruiting body, specialized cells called basidia produce spores through a process called meiosis. These spores are then released into the environment to start the cycle again.


Therefore, in a mushroom, a new plant can be grown from the spore of the plant.

Test : Plant Life - 3 - Question 5

Which among the following is an underground stem?

Detailed Solution for Test : Plant Life - 3 - Question 5
Underground stem:
- An underground stem, also known as a rhizome, is a modified plant stem that grows horizontally underground.
- It functions as a storage organ and as a means of vegetative reproduction.
- Underground stems can give rise to new shoots and roots, allowing the plant to spread and colonize new areas.
Identifying the underground stem:
- Among the options given, the plant that has an underground stem is Ginger (Option B).
- Ginger is a rhizome, which means its stem grows horizontally underground.
- The ginger plant stores nutrients and produces shoots and roots from its underground stem.
Eliminating other options:
- Sugarcane (Option A) does not have an underground stem. It has a tall, upright stem known as a culm.
- Hibiscus (Option C) does not have an underground stem. It has an upright stem that grows above the ground.
- Rose (Option D) does not have an underground stem. It has a woody stem that grows above the ground.
Conclusion:
- The correct answer is Ginger (Option B) as it is the only plant among the options given that has an underground stem or rhizome.
Test : Plant Life - 3 - Question 6

Match the following:

Test : Plant Life - 3 - Question 7

Which among the following is not a rabi crop?

Detailed Solution for Test : Plant Life - 3 - Question 7
Explanation:

  • Cabbage: It is a rabi crop.

  • Cauliflower: It is a rabi crop.

  • Bajra: It is a kharif crop, not a rabi crop.

  • Pea: It is a rabi crop.

  • None of these: This option is not correct because one of the crops listed is not a rabi crop.


Therefore, the correct answer is C: Bajra as it is not a rabi crop.

Test : Plant Life - 3 - Question 8

Sugarcane reproduces by _____ cutting.

Detailed Solution for Test : Plant Life - 3 - Question 8
Sugarcane reproduction by stem cutting
Sugarcane is a perennial grass that reproduces asexually through stem cuttings. This means that new plants can be grown from sections of the stem. Here is a detailed explanation of how sugarcane reproduces through stem cutting:
1. Selection of the stem: A healthy and mature sugarcane plant is selected for stem cutting. The stem should be free from any disease or damage.
2. Preparation of the stem: The stem is cut into sections, typically around 2-3 feet long. Each section should have at least one bud or node present.
3. Planting the stem: The cut sections of the stem are then planted in the soil. They are usually planted horizontally or at a slight angle to encourage better root development.
4. Root and shoot formation: The planted stem sections start developing roots from the nodes. Simultaneously, shoots emerge from the buds present on the stem.
5. Growth and development: As the roots and shoots grow, a new sugarcane plant is formed. The shoots develop into new stalks, while the roots provide the necessary nutrients and water for growth.
6. Harvesting: Sugarcane plants grown from stem cuttings take several months to reach maturity. Once the stalks have reached the desired size and sugar content, they are harvested for processing into sugar or other sugarcane products.
In conclusion, sugarcane reproduces through stem cuttings, where sections of the stem are planted in the soil, leading to the development of new plants with root and shoot growth.
Test : Plant Life - 3 - Question 9

The seeds of this plant are dispersed by: 

Detailed Solution for Test : Plant Life - 3 - Question 9

Seed Dispersal by Explosion

- Mechanism of Explosive Dispersal:
- Some plants have evolved a fascinating method of seed dispersal through a mechanism commonly referred to as "explosion." In this process, the fruit or seed pod dries out as it matures, and the tension within the pod builds up until it reaches a breaking point. At this point, the pod bursts open with a force that scatters the seeds away from the parent plant.

- Advantages of Explosive Dispersal:
- This method of dispersal allows the seeds to be spread over a wider area compared to simply dropping them to the ground. It reduces the competition among seedlings and between the seedlings and the parent plant for sunlight, water, and nutrients.
- It also increases the chances of the seeds reaching new and potentially more favorable environments for germination and growth.

- Examples of Plants with Explosive Seed Dispersal:
- A classic example of a plant that disperses its seeds through explosion is the touch-me-not plant (Impatiens spp.), which has seed pods that burst open when touched or when they have matured fully.
- Another example is the witch hazel (Hamamelis virginiana), which uses a similar mechanism to forcefully eject its seeds.

- Ecological Significance:
- Explosive dispersal is particularly significant in ecosystems where direct competition for resources is intense. By ensuring that seeds are spread out, plants that employ this method can maintain their populations and expand their distribution more effectively than if the seeds were simply dropped beneath the parent plant.

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Test : Plant Life - 3 - Question 10

Which among the following seeds are dispersed by wind?

Detailed Solution for Test : Plant Life - 3 - Question 10
Answer:
The seeds that are dispersed by wind among the given options are:
- Cotton: Cotton seeds have a tuft of fine hairs called "pappus" that allows them to be easily carried by wind.
- Madar: Madar seeds have wing-like structures called "samara" that aid in wind dispersal.
- Hiptage: Hiptage seeds have a feathery structure that helps them to float and be dispersed by wind.
Therefore, the correct answer is option D: All the above.
Test : Plant Life - 3 - Question 11

Which among the following is a monocot seed?

Detailed Solution for Test : Plant Life - 3 - Question 11

To identify the monocot seed among the given options, let's first understand the characteristics of monocot seeds:
1. Monocots belong to the class Monocotyledonae, which means they have a single cotyledon (seed leaf) in their seeds.
2. Monocot seeds typically have parallel veins in their leaves.
3. Monocots usually have fibrous root systems.
Now, let's analyze each option:
A: Peas
- Peas are dicot plants, not monocots. They have two cotyledons in their seeds, making them dicotyledonous.
B: Beans
- Beans are also dicot plants, not monocots. They have two cotyledons in their seeds, making them dicotyledonous.
C: Gram
- Gram, also known as chickpeas or garbanzo beans, is a dicot plant, not a monocot. It has two cotyledons in its seeds, making it dicotyledonous.
D: Corn
- Corn is a monocot plant, and its seeds are monocotyledonous. Corn seeds have a single cotyledon, parallel veins in their leaves, and a fibrous root system.
E: None of these
- This option is incorrect as corn (option D) is a monocot seed.
Therefore, the correct answer is D: Corn.
Test : Plant Life - 3 - Question 12

It stores the food for the growing seedling in a seed.

Detailed Solution for Test : Plant Life - 3 - Question 12

The food for the growing seedling is stored in a seed in a structure called the cotyledon. Here is a detailed explanation:
1. Seed coat:
- The seed coat is the protective outer covering of the seed.
- Its main function is to protect the seed from mechanical damage, pathogens, and desiccation.
2. Shoot:
- The shoot refers to the above-ground part of the plant, including the stem, leaves, and flowers.
- It is responsible for photosynthesis and reproduction.
3. Underground stem:
- An underground stem is a modified stem that grows horizontally underground.
- Examples include rhizomes, tubers, and bulbs.
- They serve as storage organs for nutrients and water and can also produce new shoots.
4. Cotyledon:
- The cotyledon is a structure found within the seed.
- It serves as a storage organ for food reserves, such as carbohydrates, proteins, and fats.
- These food reserves are used by the seedling during germination and early growth until it can produce its own through photosynthesis.
- Cotyledons can be either one or two in number, depending on the type of seed (monocotyledonous or dicotyledonous).
5. None of these:
- This option is incorrect as the correct answer is the cotyledon.
In summary, the cotyledon is responsible for storing food reserves in the seed, which are essential for the growth and development of the seedling until it can sustain itself through photosynthesis.
Test : Plant Life - 3 - Question 13

Which among the following can be grown from the stem of a plant?

Detailed Solution for Test : Plant Life - 3 - Question 13
Stem Cuttings:
- Stem cuttings are a common method of plant propagation.
- Certain plants can be grown from stem cuttings, where a section of the stem is cut from the parent plant and then planted to grow a new plant.
- Stem cuttings can be taken from the stems of various plants and can result in successful growth.
Options:
A: Carrot:
- Carrots are root vegetables, and they do not grow from stem cuttings. They are typically grown from carrot seeds or carrot tops.
B: Radish:
- Radishes are root vegetables, and they do not grow from stem cuttings. They are typically grown from radish seeds.
C: Turnip:
- Turnips are root vegetables, and they do not grow from stem cuttings. They are typically grown from turnip seeds.
D: Potato:
- Potatoes can be grown from stem cuttings.
- The stem of a potato plant, also known as a tuber, can be cut into sections, each containing at least one "eye" or bud, and planted to grow a new potato plant.
E: None of these:
- This option is incorrect, as potatoes can be grown from stem cuttings.
Conclusion:
- Among the given options, only potatoes can be grown from stem cuttings.
- The correct answer is D: Potato.
Test : Plant Life - 3 - Question 14

A new plant can be grown through leaves in:

Detailed Solution for Test : Plant Life - 3 - Question 14

To answer this question, we need to analyze each option and determine if it is possible for a new plant to be grown through leaves.
Bryophyllum:
- Bryophyllum is a type of succulent plant that is known for its ability to produce new plants through its leaves.
- The leaves of Bryophyllum have small plantlets along their edges, which can grow into new plants when detached from the parent plant.
- Therefore, it is possible to grow a new plant through leaves in Bryophyllum.
Ferns:
- Ferns reproduce through spores rather than seeds.
- While new fern plants can be grown from spores, they are not typically grown through leaves.
- Therefore, it is unlikely that a new plant can be grown through leaves in ferns.
Ginger:
- Ginger is a rhizomatous plant, meaning it grows from underground stems called rhizomes.
- While new ginger plants can be grown from rhizome cuttings, they are not typically grown through leaves.
- Therefore, it is unlikely that a new plant can be grown through leaves in ginger.
Garlic:
- Garlic is a bulbous plant that grows from individual cloves.
- While new garlic plants can be grown from cloves, they are not typically grown through leaves.
- Therefore, it is unlikely that a new plant can be grown through leaves in garlic.
Conclusion:
Based on the analysis, the correct answer is option A: Bryophyllum. Bryophyllum is the only plant among the given options that can successfully grow a new plant through its leaves.
Test : Plant Life - 3 - Question 15

Which among the following is not a kharif crop?

Detailed Solution for Test : Plant Life - 3 - Question 15
Explanation:
The correct answer is C: Bean, which is not a kharif crop. Here's a detailed explanation:
Kharif crops are crops that are sown in the rainy season and harvested in the autumn season. They require a hot and humid climate with a good amount of rainfall. Some examples of kharif crops include rice, maize, and jowar.
Here's a breakdown of the given options:
- A: Rice: Rice is a kharif crop. It requires a lot of water and is usually grown in flooded fields.
- B: Maize: Maize is also a kharif crop. It is a staple food crop in many parts of the world and is grown in warm and humid conditions.
- C: Bean: Bean is not a kharif crop. It is typically grown during the rabi season, which is the winter season.
- D: Jowar: Jowar is a kharif crop. It is a type of millet and is grown in areas with low rainfall.
- E: None of these: This option is incorrect as it does not specify which crop is not a kharif crop.
In conclusion, the correct answer is C: Bean, as it is not a kharif crop.
Test : Plant Life - 3 - Question 16

The eyes of potato are:

Detailed Solution for Test : Plant Life - 3 - Question 16
The eyes of potato are:

  • Leaves: No, the eyes of a potato are not leaves. They are small indentations on the surface of the potato.

  • Buds: Yes, the eyes of a potato are actually dormant buds. These buds have the potential to grow into new potato plants.

  • Roots: No, the eyes of a potato are not roots. The roots of a potato plant grow from the bottom of the potato, not from the eyes.

  • Flowers: No, the eyes of a potato do not develop into flowers. They are specifically buds that have the potential to sprout into new potato plants.

  • None of these: The correct answer is "b" - buds. The eyes of a potato are actually the buds that have the potential to grow into new potato plants.


To summarize, the eyes of a potato are dormant buds that have the potential to grow into new potato plants, not leaves, roots, or flowers.
Test : Plant Life - 3 - Question 17

Crops grown in ____ season are also known as rabi crops.

Detailed Solution for Test : Plant Life - 3 - Question 17

The correct answer is C: Winter. Crops grown in the winter season are known as rabi crops. Rabi crops are typically sown in October and November and harvested in April and May. These crops require cool temperatures and a sufficient amount of water for their growth. Some examples of rabi crops include wheat, barley, mustard, gram, and peas.
Here is a detailed explanation of the given options:
- A: Summer: Summer crops are known as kharif crops, not rabi crops.
- B: Autumn: Autumn is not a specific season for crop cultivation. It is a transition period between summer and winter.
- C: Winter: Correct answer. Crops grown in the winter season are known as rabi crops.
- D: Spring: Spring crops are also known as zaid crops, not rabi crops.
- E: None of these: The correct answer is option C, winter.
To summarize, rabi crops are grown in the winter season and include crops like wheat, barley, mustard, gram, and peas.
Test : Plant Life - 3 - Question 18

Which among the following is grown in summer?

Detailed Solution for Test : Plant Life - 3 - Question 18

Introduction:
In this question, we need to determine which among the given options is grown in summer.
Options:
The given options are:
A: Cauliflower
B: Radish
C: Bean
D: Brinjal
E: None of these
Analysis:
To identify the crop grown in summer, we need to consider the growing seasons of the crops mentioned in the options.
Explanation:
The crops grown in summer are generally heat-tolerant and require warm weather to thrive. Let's analyze each option to determine the crop grown in summer:
- Option A: Cauliflower: Cauliflower is typically grown in cooler climates and is considered a cool-season crop. It is not grown in summer.
- Option B: Radish: Radish is a cool-season crop and is not grown in summer.
- Option C: Bean: Beans, such as green beans and snap beans, are warm-season crops that are commonly grown in summer. They require warm temperatures and sunlight to grow.
- Option D: Brinjal: Brinjal, also known as eggplant, is a warm-season crop that is typically grown in summer.
- Option E: None of these: This option is not correct as at least one of the options (Option C: Bean) is grown in summer.
Conclusion:
From the analysis, we can conclude that the crop grown in summer among the given options is Option C: Bean.
Test : Plant Life - 3 - Question 19

Cotton plant is best grown in ____ soil.

Detailed Solution for Test : Plant Life - 3 - Question 19

The soils are generally rich in montmorillonitic and beidellitic group of clay minerals. 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.

Test : Plant Life - 3 - Question 20

Practice of growing plants on large scale is:

Detailed Solution for Test : Plant Life - 3 - Question 20
Practice of growing plants on large scale is:

  • Agriculture: The correct answer is C. Agriculture. It is the practice of cultivating crops and raising livestock for food, fiber, medicinal plants, and other products used to sustain and enhance human life.


Explanation:
- Agriculture is the practice of growing plants on a large scale to produce food, feed, fiber, and other products.
- It involves various activities such as soil preparation, planting, irrigation, fertilization, pest control, and harvesting.
- Farmers use different farming methods and techniques to maximize crop yields and ensure the health and productivity of their plants.
- Agriculture plays a crucial role in providing food security and supporting the economy of many countries.
- It is a complex and diverse field that encompasses various branches such as horticulture, agronomy, animal husbandry, and agricultural engineering.
- The practice of agriculture has evolved over centuries, with advancements in technology and scientific knowledge.
- It is essential for sustainable development and the preservation of natural resources.
- By practicing agriculture, we can meet the growing demand for food and contribute to the overall well-being of society.
Conclusion:
The practice of growing plants on a large scale is referred to as agriculture. It involves all the necessary activities to cultivate crops and raise livestock for various purposes. Agriculture is a vital sector that supports food production, sustains livelihoods, and contributes to the overall development of a nation.
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