General Science 6th Class Chapter 2 Reproduction in Plants Solved Exercise

General Science

6th Class

Chapter 2

Reproduction in Plants

Questions

2.1 Encircle the correct option.

1. Pollination is the transfer of:

a. sepal        b. stamen        c. pollen grain        d. ovum

2. Zygote is formed as a result of:

a. self-pollination        b. cross pollination        c. fertilization        d. double fertilization

3. Zygote develops into:

a. embryo        b. embryo sac        c. endosperm        d. ovule

4. Asexual reproduction in which stem of a plant is buried in soil near the present plant:

a. layering        b. budding        c. cutting        d. grafting

5. The organ of a plant which takes part in sexual reproduction:

a. root        b. stem        c. leaf        d. flower

6. The structure which is helpful to carry sperms to the ovary:

a. pollen tube        b. stigma        c. style        d. ovary

7. Which is the example of natural vegetative propagation?

a. runners' growth into new plant        b. budding        c. cutting        d. grafting

8. Production of new plant from underground stem is an example of:

a. sexual reproduction        b. asexual reproduction

c. self-pollination        d. cross pollination

9. Fusion of a sperm with two polar nuclei forms:

a. zygote        b. embryo        c. ovum        d. endosperm

10. Male reproductive cell:

a. egg        b. sperm        c. neuron        d. zygote

2.2 Differentiate between:

1. Sexual reproduction and asexual reproduction

Ans.

The microorg

2. Self-pollination and cross pollination

Ans.

3. Pollen grain and ovule

Ans.

4. Fertilization and double fertilization

Ans.

5. Budding and grafting

Ans.

6. Scion and stock

Ans.

2.3 Give short answers.

1. Name three self -pollinated plants.

Ans.

Pea, cotton and tomato are self-pollinated plants.

2. Name three cross pollinated plants.

Ans.

Maize, Papaya and rose are cross pollinated plants.

3. Name the underground stems that undergo natural vegetative propagation.

Ans.

Underground stems like bulb and tuber are the example of natural vegetative propagation in plants.

4. What are runners?

Ans.

In some plants such as strawberry and grasses, stems are spread horizontally above the ground. These stems are called runners. Runners have nodes where buds are present. New plants grow from these buds.

5. Name different parts of the carpel (female reproductive structure).

Ans.

Stigma, style and ovary are parts of carpel (female reproduction structure).