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Reproduction in Plants

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Which of the following statements is/are correct? a. Some plants can grow completely underwater. b. Roots of some plants are also found above the ground. c. Plants grow towards light.

  1. Only a

  2. Only b

  3. Only c

  4. Only a and c

  5. All of these


Correct Option: E
Explanation:

All the given statements are correct. Hence, this option is correct.

Which of the following plants grow(s) from stem cutting?

a. Sugarcane b. Sweet potato c. Hibiscus

  1. Only a

  2. Only b

  3. Only c

  4. Both a and c

  5. Both a and b


Correct Option: D
Explanation:

This is the correct option. Both hibiscus and sugarcane grow from stem cutting. A small piece of stem containing bud is cut from the plant and placed in moist soil. Roots start developing after some time and a new plant grows. Rose also grows from stem cutting.

Which of the following pairs contains monocot seeds only?

  1. Gram and peas

  2. Peas and beans

  3. Gram and rice

  4. Peas and maize

  5. Rice and maize


Correct Option: E
Explanation:

Rice and maize have one cotyledon each and are thus monocot seeds.

Which of the following are dicot seeds? a. Gram b. Peas c. Rice d. Maize e. Wheat f. Beans

  1. Only a, b and c

  2. Only b, c and d

  3. Only c, d and e

  4. Only a, b and f

  5. Only a, e and f


Correct Option: D
Explanation:

This is the correct answer. Peas, gram and beans are dicot seeds.

By which of the following processes does a seed produce a seedling or a baby plant?

  1. Dispersal

  2. Sowing

  3. Germination

  4. Reproduction

  5. Harvesting


Correct Option: C
Explanation:

The process by which a seed produces a seedling or a baby plant is called germination.

Which of the following is/are parts of a seed? a. Seed coat b. Cotyledons c. Embryo

  1. Only a

  2. Only b

  3. Only c

  4. All of these

  5. Only a and b


Correct Option: D
Explanation:

This is the correct answer. The outer hard cover of a seed is called seed coat. Beneath the seed coat, there are the seed leaves called cotyledones. The food required to keep the embryo alive is in the cotyledon. The seed carries an embryo inside. It  carries the basic parts, which are the plumule and the radicle.

Which of the following does not act as an agent for dispersal?

  1. Wind

  2. Water

  3. Humans

  4. Sunlight

  5. Explosion of fruits


Correct Option: D
Explanation:

Sunlight is necessary for the growth of plants. It is not an agent of dispersal.

Which of the following reproduces from its leaves?

  1. Mushroom

  2. Fungus

  3. Mould

  4. Bryophyllum

  5. Sycamore


Correct Option: D
Explanation:

Bryophyllum grows plantlets on the edges of its leaves. These plantlets or leaf buds have roots. They fall off and grow into plants.

Which of the following plants do not reproduce by vegetative reproduction?

a. Onion b. Bryophyllum c. Mushroom

  1. Only a

  2. Only b

  3. Only c

  4. Both a and b

  5. Both b and c


Correct Option: C
Explanation:

Mushroom reproduces through spores. This is the correct answer.

Which of the following seeds is/are dispersed by water? a. Coconut b. Hydrilla c. Sycamore

  1. Only a

  2. Only b

  3. Only c

  4. Only a and b

  5. Only b and c


Correct Option: D
Explanation:

This is the correct answer. Coconut seed is dispersed through water. It has a thick fibrous covering around its seeds that help them to float. Hydrilla is a water plant and it uses water to disperse its seeds.

Which of the following reproduce(s) from spores?

a. Fungus b. Mould c. Money plant

  1. Only a

  2. Only b

  3. Only c

  4. Both a and b

  5. Both a and c


Correct Option: D
Explanation:

This is the correct answer because both fungus and mould reproduce from spores. This is the correct option.

Which of the following plants is not an annual plant?

  1. Sunflower

  2. Marigold

  3. Basalm

  4. Talipot palm

  5. All of these


Correct Option: D
Explanation:

Talipot palm takes about 30-80 years to flower, then dies. It is not an annual plant.

Which of the following statements is/are correct? a. Plants reproduce in different ways. b. A seed germinates only under certain conditions. c. Scattering of seeds causes vegetative reproduction.

  1. Only a

  2. Only b

  3. Only c

  4. Only a and b

  5. All of these


Correct Option: D
Explanation:

Both these statements are correct. Plants reproduce in different ways. A seed germinates under certain conditions. It needs water, warmth and air to germinate.

Swiss engineer George de Mestral invented velcro after observing a part of a plant. Which of the following parts of a plant inspired him?

  1. Seeds

  2. Flowers

  3. Fruits

  4. Stem

  5. Leaves


Correct Option: A
Explanation:

Swiss engineer George de Mestral invented velcro after studying burrs or seeds that stuck on clothes and animal fur. He noticed that the burrs had hooks that caught on anything with loops. The same mechanism is used in making velcro.

Which of the following is/are seeds? a. Pip of an apple b. Nut of a walnut c. Peas in a pod

  1. Only a

  2. Only b

  3. Only c

  4. Only a and c

  5. All of these


Correct Option: E
Explanation:

This is the correct answer because all of these are seeds.

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