CBSE 8th Standard Science Reproduction in Animals Important Questions And Answers Study Material - QB365 Set B | QB365

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CBSE 8th Standard Science Reproduction in Animals Important Questions And Answers Study Material - QB365 Set B

Published on: 29/10/2025

Question Set B

CBSE 8th Standard Science Reproduction in Animals Important Questions And Answers Study Material - QB365

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Std: 8th Standard CBSE - Science

chapter: Reproduction in Animals - Important Questions And Answers

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Questions:

Generic 3

5 x 3 = 15

Draw a labelled diagram of female reproductive organs.

Observe the figure given and answer the questions that follow.

(a) Label A and B.
(b) Identify the process.
(c) What happens during the process and what is formed?

Name the different stages of the cockroach.

Explain the following terms. Zygote, larva, placenta and foetus.

What is metamorphosis? Give examples.

Generic 2

7 x 2 = 14

Draw a well labelled diagram of human sperm

What IS IVF?

What do you understand by the term gestation?

Give the other name of oviducts.

10.

Explain the term parthenogenesis.

11.

Name the male sex hormone.

12.

Name a unicellular and multicellular animal which can reproduce by asexual methods.

Generic 5

2 x 5 = 10

13.

(a) Give the term used for the fusion of gametes.
(b) Name the type of fertilisation in humans
(c) Where does it mainly occur?
(d) Fertilisation in humans takes place'ln female. How?

14.

After observing figure above, answer the following.
(a) Read the following statements and label them in the figure.
(i) The part which produces female gametes.
(ii) The part where development of the baby takes place.
(iii) The part through which the developing embryo passes to reach the uterus.
(b) Explain the future development of the embryo that would take place after it gets embedded in the uterus.

Multiple Choice Question

8 x 1 = 8

15.

The production of an exact copy of an animal by asexual reproduction is known as

(a)

budding

(b)

mating

(c)

cloning

(d)

hatching

16.

In human beings, after fertilisation, the structure which gets embedded in the wall of uterus is

(a)

ovum

(b)

embryo

(c)

foetus

(d)

zygote

17.

Tadpole is the larva of

(a)

fish

(b)

frog

(c)

mosquito

(d)

butterfly

18.

Animals exhibiting external fertilisation produce a large number of gametes. Pick the appropriate reason from the following.

(a)

The animals are small in size and want to produce more offsprings

(b)

Food is available in plenty in water

(c)

To ensure better chance of fertilisation

(d)

Water promotes production of large number of gametes

19.

Which is not oviparous animals?

(a)

Hen

(b)

Frog

(c)

Butterfly

(d)

Dog

20.

In humans, the development of fertilised egg takes place in the

(a)

ovary

(b)

testis

(c)

oviduct

(d)

uterus

21.

The multicellular organism which reproduces by budding is

(a)

Amoeba

(b)

Yeast

(c)

Paramecium

(d)

Hydra

22.

Which of the following is not a viviparous animal?

(a)

Rat

(b)

Lizard

(c)

Rabbit

(d)

Cat

Fill up / 1 Marks

2 x 1 = 2

23.

Sperms are produced in ______

24.

An animal having both male and female reproductive organs is called ______

1 Marks

6 x 1 = 6

25.

What is cloning?

26.

What is foetus?

27.

What is embryo?

28.

What is the function of tail in a sperm

29.

What is meant by ovulation?

30.

Define fertilization

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Answers Key:

Generic 3

5 x 3 = 15

(a) A-sperm, B-ovum (egg).
(b) The process is fertilisation.
(c) During the process, the sperm nucleus fuses with the egg nucleus to form the zygote.

In the given figure,
A- Egg case B - Nymph C - Adult cockroach

Zygote Single celled structure formed by the fusion of male and female gamete.
Larva The active form that emerges from the eggs.
Placenta The specialised tissue that attaches the developing foetus to the uterine wall and provides it nourishment, etc.
Foetus The multicellular structure formed after the repeated cell divisions in the zygote.

The process of transformation of larva into an adult through drastic changes is called metamorphosis, e.g. development of caterpillar or pupa into silkworm and development of tadpole into frog.

Generic 2

7 x 2 = 14

IVF is In-vitro fertilization. In such cases doctor collects freshly released egg and sperms and keeps them together for a few hours for fertilization. When fertilization occurs, the zygote is formed and allowed to develop for about a week and then, it is placed in the mother's uterus. Babies produced through this technique are called test-tube babies.

The period between fertilisation and childbirth is called gestation.

Fallopian tubes is the other name of oviducts.

10.

The phenomenon by which female gametes produce off spring without fertilisation is called parthenogenesis.

11.

The male sex hormone is testosterone.

12.

Hydra (multicellular) and Amoeba (unicellular) are two animals which can reproduce by asexual methods.

Generic 5

2 x 5 = 10

13.

(a) Fertilisation is the term used for the fusion of a male gamete (sperm) and a female gamete (ovum or egg) to form a zygote during sexual reproduction.
(b) Internal fertilisation takes place in humans.
(c) Fertilisation mainly occurs in the Fallopian tube.

14.

(a) The parts in the figure are labelled below:

(b) The embryo continues to develop after it gets embedded in the uterus. It divides and differentiates into three germ layers which give rise to different body parts such as hands, legs, head, eyes, ears, etc. This stage where all the body parts are distinct and easily identified in developing embryo is called foetus. After completion of development of foetus, mother gives birth to baby.