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All questions of Plants through the Seasons for Grade 1 Exam

Palm tree does not have:
  • a)
    Branches
  • b)
    Seeds
  • c)
    Leaves
  • d)
    Flowers 
Correct answer is option 'D'. Can you explain this answer?

Om Ghoshal answered
Palm tree does not have:

Branches

Palm trees do have branches, although they differ from the branches of most other trees. The branches of a palm tree are not woody and spread horizontally from the top of the trunk. They are called fronds and are made up of leaflets attached to a central stem. The fronds of a palm tree are elongated and fan-shaped, providing the tree with its characteristic tropical appearance.

Seeds

Palm trees do have seeds. In fact, palm trees are known for their unique seed structures. Palm tree seeds are typically contained within fruit or nuts. These seeds vary in size and shape, depending on the species of palm tree. Some palm tree seeds are small and round, while others are larger and elongated. Palm tree seeds are often used for propagation, allowing new palm trees to be grown from these seeds.

Leaves

Palm trees do have leaves, although their leaves are called fronds. Palm tree fronds are elongated and fan-shaped, providing the tree with its characteristic tropical appearance. The fronds of a palm tree are made up of leaflets attached to a central stem. The leaflets are often long and narrow, giving the fronds a feathery appearance. Palm tree fronds are usually green, but some species have fronds with silvery or bluish tones.

Flowers

The correct answer is option 'D' - Palm trees do not have flowers. Unlike many other types of trees, palm trees do not produce showy flowers. Instead, palm trees reproduce through a process called pollination. They have separate male and female flowers, which are small and often inconspicuous. The male flowers produce pollen, which is carried by wind or insects to the female flowers for fertilization. After fertilization, the female flowers develop into fruits or nuts that contain the palm tree seeds. While palm tree flowers may not be as visually striking as those of other trees, they play a crucial role in the reproductive cycle of the palm tree.

Which of these is not a shrub?
  • a)
    Mehndi Plant
  • b)
    Marigold Plant
  • c)
    Tea Plant
  • d)
    Coconut Plant
Correct answer is option 'D'. Can you explain this answer?

Arindam Jain answered
Explanation:

The correct answer is option 'D' - Marigold Plant.

Shrub:

A shrub is a small to medium-sized woody plant that has multiple stems and is usually shorter than a tree. Shrubs are characterized by their bushy appearance and their ability to branch out from the base. They are often used for landscaping purposes, providing structure and color to gardens.

Mehndi Plant:

The Mehndi plant, also known as Lawsonia inermis, is a shrub that belongs to the Lythraceae family. It is native to tropical and subtropical regions and is widely cultivated for its leaves, which are used to create henna paste for body art and hair dye.

Coconut Plant:

The coconut plant, also known as Cocos nucifera, is a large palm tree that belongs to the Arecaceae family. It is not a shrub but a tree. It is found in tropical regions and is cultivated for its fruits, which are known as coconuts. The coconut palm can grow up to 30 meters in height and is commonly found on coastal areas.

Tea Plant:

The tea plant, also known as Camellia sinensis, is an evergreen shrub that belongs to the Theaceae family. It is native to East Asia and is widely cultivated for its leaves, which are used to produce tea. The tea plant can grow up to 3 meters in height and has small white flowers.

Marigold Plant:

Marigold plants, also known as Tagetes, are flowering plants that belong to the Asteraceae family. They are herbaceous annuals or perennials but not shrubs. Marigolds are known for their bright yellow, orange, and red flowers, and are often used as decorative plants in gardens and landscapes. They are native to the Americas and have been cultivated for centuries for their ornamental and medicinal properties.

In conclusion, out of the given options, the Marigold plant is not a shrub. It is a herbaceous annual or perennial plant.

Which of these plant fruit gives fibre from which clothes are made?
  • a)
    Cotton
  • b)
    Jasmine
  • c)
    Rose
  • d)
    China Rose
Correct answer is option 'A'. Can you explain this answer?

Tanishq Gupta answered
Cotton is the plant that gives fiber from which clothes are made.

Explanation:
Cotton is a type of plant that belongs to the family Malvaceae and is native to tropical and subtropical regions around the world. It is known for its soft, fluffy fibers that grow around the seeds of the cotton plant. These fibers are the primary source of natural fiber used in the production of clothing and textiles.

Cotton fiber is obtained from the bolls of the cotton plant. The bolls are the fruit of the cotton plant, which contain the seeds and the fibers. The fibers are composed of cellulose, a complex carbohydrate that provides strength and flexibility to the cotton fibers. These fibers are arranged in a twisted, ribbon-like structure, which gives cotton its characteristic softness and breathability.

Cotton is harvested by picking the bolls from the cotton plant when they are fully mature. The bolls are then processed to remove the seeds and separate the fibers. This process involves several steps, including ginning, carding, and spinning, which help to clean, align, and twist the fibers into yarn.

Once the cotton fibers are spun into yarn, they can be further processed and woven or knitted into fabrics. Cotton fabrics are highly versatile and can be used to make a wide range of clothing items, including t-shirts, jeans, dresses, and more. Cotton is valued for its softness, comfort, and breathability, making it a popular choice for clothing in both warm and cool climates.

In conclusion, cotton is the plant that gives fiber from which clothes are made. Its soft, fluffy fibers are harvested from the bolls of the cotton plant and processed into yarn, which is then woven or knitted into fabrics for clothing production.

Which of the following plant stems are edible?
  • a)
    Sugarcane
  • b)
    Ginger
  • c)
    Onion
  • d)
    All of these
Correct answer is option 'D'. Can you explain this answer?

Bhoomika rao answered
Edible Plant Stems

Introduction

Plant stems are an essential part of the plant anatomy that provides support and transportation of water, nutrients, and sugars. While many plant stems are not typically consumed, there are several edible plant stems that are commonly used in cooking and have various culinary applications. In this case, all of the options provided - sugarcane, ginger, and onion - have edible stems.

1. Sugarcane

Sugarcane (a) is a tall perennial grass that is primarily cultivated for its sweet juice, which is extracted from its stalks. The stems of sugarcane are thick and fibrous, containing a high concentration of sucrose. Sugarcane is extensively grown in tropical and subtropical regions, and its juice is commonly used to produce sugar, molasses, and various sugarcane-based products. The stalks of sugarcane can also be chewed directly to extract the sweet juice, providing a refreshing treat.

2. Ginger

Ginger (b) is a flowering plant that is widely used as a spice and natural remedy in various cuisines and traditional medicine. The part of ginger that is commonly used is its rhizome, which is an underground stem. However, the above-ground stem of ginger, known as the "pseudostem," is also edible. Although it is less commonly consumed compared to the rhizome, the pseudostem of ginger can be used in cooking to add a mild ginger flavor. It is often sliced or grated and used in stir-fries, soups, or as an aromatic ingredient in various dishes.

3. Onion

Onion (c) is a widely cultivated vegetable known for its strong flavor and culinary versatility. While the edible part of an onion is its bulb, which grows underground, the above-ground stem of an onion is also edible. The stem of an onion is commonly referred to as the "green onion" or "scallion." It has a milder taste compared to the bulb and is often used as a garnish or ingredient in salads, stir-fries, soups, and other dishes. Green onions can be harvested young when the stem is tender and green, or they can be left to mature, forming a bulb-like structure at the base.

Conclusion

In conclusion, all of the options provided - sugarcane, ginger, and onion - have edible stems. Sugarcane stalks are rich in sucrose and are primarily used to produce sugar and sugarcane-based products. Ginger's above-ground stem, known as the pseudostem, can be used in cooking to add a mild ginger flavor. Onion stems, also called green onions or scallions, have a milder taste compared to the bulb and are commonly used as a garnish or ingredient in various dishes.

What is the role of hyenas, jackals, and vultures in the ecosystem?
  • a)
    They hunt other animals.
  • b)
    They primarily eat plants.
  • c)
    They eat the remains of dead animals, keeping the environment clean.
  • d)
    They eat insects and small mammals.
Correct answer is option 'C'. Can you explain this answer?

Arjun Sharma answered
Role of Hyenas, Jackals, and Vultures in the Ecosystem
Hyenas, jackals, and vultures play a crucial role in maintaining the balance of the ecosystem by primarily feeding on the remains of dead animals. This scavenging behavior has several important implications for the environment and other organisms.

Hyenas:
- Hyenas are known to scavenge on carcasses left behind by other predators or animals that have died naturally.
- By consuming the remains of dead animals, hyenas help in recycling nutrients back into the ecosystem.
- They also help in preventing the spread of diseases by consuming carrion before it has a chance to decompose and release harmful pathogens.

Jackals:
- Jackals are opportunistic feeders that also scavenge on the remains of dead animals.
- They play a role in cleaning up the environment by removing carcasses that could otherwise attract disease-spreading pests.
- Jackals help in maintaining the health of the ecosystem by preventing the buildup of decaying organic matter.

Vultures:
- Vultures are specialized scavengers that have highly acidic stomachs capable of digesting pathogens present in carrion.
- They are often the first to locate and feed on carcasses, preventing the spread of disease in the environment.
- Vultures contribute to the efficient decomposition of dead animals, which helps in nutrient recycling and maintaining ecosystem health.
In conclusion, hyenas, jackals, and vultures play a critical role in the ecosystem by consuming the remains of dead animals. Their scavenging behavior helps in nutrient recycling, disease prevention, and overall environmental cleanliness.

Which part of plant gives out sweet fragnance to attract butterflies?
  • a)
    Flowers
  • b)
    Leaves
  • c)
    Fruits
  • d)
    All of the above
Correct answer is option 'A'. Can you explain this answer?

Flowers give out sweet smells to attract butterflies. The fragrance helps butterflies find the flowers, so they can drink nectar. The nectar is food for butterflies.

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