CBSE 7th Standard Science Reproduction in Plants Sample Question Papers Study Material - QB365 Set A | QB365

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CBSE 7th Standard Science Reproduction in Plants Sample Question Papers Study Material - QB365 Set A

Published on: 31/10/2025

Question Set A

CBSE 7th Standard Science Reproduction in Plants Sample Question Papers Study Material - QB365

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Std: 7th Standard CBSE - Science

chapter: Reproduction in Plants - Sample Question Papers

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Questions:

Explain what do you understand by sexual reproduction?

State the main differences between asexual and sexual reproduction.

Explain the differences between self-pollination and cross-pollination.

In the figure given below, label the part marked (i), (ii) and (iii).

What is a bud? Which organism reproduces by budding? Given the diagrammatic representation of budding in a plant.

How does male gamete present in pollen grain reaches female gamete present in ovule?

Mature ovary forms the

(a)

seed

(b)

stamen

(c)

pistil

(d)

fruit

Seeds of drumstick and maple are carried to long distances by wind because they possess.

(a)

winged seeds

(b)

large and hairy seeds

(c)

long and ridged fruits

(d)

spiny seeds

Lila observed that a pond with clear water was covered up with a green algae within a week.
By which method of reproduction did the algae spread so rapidly?

(a)

Budding

(b)

Sexual reproduction

(c)

Fragmentation

(d)

Pollination

10.

Which of the following parts of a plant take part in sexual reproduction?
(i) Flower
(ii) Seed
(iii) Fruit
(iv) Branch
Choose the correct answer from below.

(a)

(i) and (ii)

(b)

(i), (ii) and (iii)

(c)

(iii) and (iv)

(d)

(ii), (iii) and (iv)

11.

The ovaries of different flowers may contain

(a)

only one ovule

(b)

many ovules

(c)

one to many ovules

(d)

only two ovules

12.

Which of the following statements is/are true for sexual reproduction in plants?
(i) Plants are obtained from seeds
(ii) Two plants are always essential
(iii) Fertilisation can occur only after pollination
(iv) Only insects are agents of pollination
Choose from the options given below.

(a)

(i) and (iii)

(b)

only (i)

(c)

(ii) and (iii)

(d)

(i) and (iv)

13.

The fusion of male and female gametes is called

(a)

ovulation

(b)

population

(c)

pollination

(d)

fertilisation

14.

Which among the following do not reproduce by vegetative reproduction?

(a)

Wheat

(b)

Sugarcane

(c)

Rose

(d)

Jasmine

15.

The mode of vegetative reproduction where scion and stock are used is called

(a)

budding

(b)

grafting

(c)

cutting

(d)

layering

16.

The female gamete of a flowering plant is present in which part?

(a)

Ovules

(b)

Buds

(c)

Pollen

(d)

Anther

17.

Fungus, moss and fern reproduce by a common method of asexual reproduction. Name the method.

18.

Flowers are colourful and fragrant. Give reason supporting the statement.

19.

Name two plants where vegetative reproduction takes place by roots.

20.

A yellow powdery substance is present in the anther which participates in reproduction process. Name this substance.

21.

In which part of flower does fertilisation occur?

22.

Bryophyllum leaves reproduce using which mode of reproduction?

23.

In the figure of a flower given below, label the parts whose functions are given below and give their names.
(a) The part which contains pollen grains.
(b) The part where the female gamete is formed.
(c) The female reproductive part, where pollen grains germinate.
(d) The colourful part of flower which attracts insects.

24.

Explain the process of reproduction in plants, involving the fusion of cells from male and female parts of a flower.

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Answers Key:

Sexual reproduction is a process of formation of new individuals by involving two parents or gamete formation. In sexually reproducing plants, new plants are produced from seeds.
In this method, gametes fuses to form zygote that gives rise to new individual.

The main differences between asexual and sexual reproduction are

Asexual reproduction	Sexual reproduction
Only one parent is needed	Two parents a male and a female are required.
Offsprings are genetically identical to their parents.	Offsprings exhibit variation with respect to their parents.
No seed is formed. Fragmentation, budding, spore formation, vegetative propagation are its different types	Seeds are formed due to fusion of male and female gametes.
Spirogyra, yeast, moulds and potato exhibit asexual reproduction	Fruit-bearing plants like mango and China rose, reproduce sexually.

The differences between self-pollination and cross-pollination are

Self-pollination	Cross-pollination
Pollens are transferred to the stigma of same flower.	Pollens are transferred to the stigma of different flower.
Do not require pollinating agents.	Requires pollinating agents.
Occurs in legumes peanuts and sunflower	Common in most of flowers like rose, China rose, etc

The parts in the given figure are labelled as follows

Buds are small bulb-like projections of yeast cell.
These are asexual reproducing bodies of yeast. Diagrammatic representation of budding in yeast

After pollination, the pollen grains fall on the surface of stigma and germinate to form a long tube, reaching the ovules inside the ovary, the egg or female gamete is present in the ovule.
The outer surface of pollen grains rupture and male gametes are released to fuse with egg.

Mature ovary forms the fruit.

(a)
winged seeds

10.

(b)
(i), (ii) and (iii)

11.

12.

(a)
(i) and (iii)

13.

(d)
fertilisation

14.

(a)
Wheat

15.

(b)
grafting

16.

(a)
Ovules

17.

Fungus, moss and fern reproduce by the common method of spore formation which is a type of asexual reproduction.

18.

Flowers are so colourful because they absorb and reflect light energy. Fragrance results from production of volatile chemicals which evaporate.

19.

Sweet potato and dahlia develop new plants through their roots by the process of vegetative reproduction.

20.

Pollen grains.

21.

Ovary is the part where male and female gametes fuse together.

22.

Asexually by vegetative propagation.

23.

The various parts of a flower whose functions are mentioned above are labelled as follows:

24.

When the reproduction in an organism includes two types of gametes, i.e male and female from two different parents, it is called sexual reproduction, The sexual reproduction takes place by the fusion of male and female gametes by the process called fertilisation to form zygote.

Sexual reproduction (fertilisation) in plants The different steps that take place during sexual reproduction in plants are
(i) The pollens are deposited on stigma and begin to germinate.
(ii) Pollen tube containing male gametes reaches to the ovary of flower.
(iii) The tip of the pollen tubes gets dissolved and male gametes comes out of the pollen tube.
(iv) Inside the ovary male gametes fuse with the female gamete or egg present in the ovule.
(v) The fusion of both the gametes will result into a fertilised egg cell which is also called as zygote.