Reproduction in Animals — Class 8 MCQs with Answers

Reproduction in Animals — important questions & MCQs with answers (Class 8 Science)

14 solved questions from this chapter's difficulty levels, each with its answer and explanation. The other 58 are timed and scored when you sign in.

1. Q1Easy

   Reproduction that involves two parents and the fusion of gametes is called:

   A.Asexual reproduction

   B.Sexual reproduction✓ Correct

   C.Budding

   D.Binary fission

   Answer: B. Sexual reproduction

   Explanation: Sexual reproduction involves a male and a female parent whose gametes fuse.

2. Q2Easy

   The male gamete in animals is the:

   A.Sperm✓ Correct

   B.Egg

   C.Zygote

   D.Embryo

   Answer: A. Sperm

   Explanation: The sperm is the male gamete, produced in the testes.

3. Q3Easy

   Animals that give birth to young ones are called:

   A.Oviparous

   B.Viviparous✓ Correct

   C.Cold-blooded

   D.Egg-laying

   Answer: B. Viviparous

   Explanation: Viviparous animals (humans, cows, dogs) give birth to live young.

4. Q4Easy

   Hydra reproduces asexually by:

   A.Binary fission

   B.Laying eggs

   C.Budding✓ Correct

   D.Fertilisation

   Answer: C. Budding

   Explanation: In Hydra a bud grows on the body, develops and detaches as a new individual.

5. Q5Easy

   The young one of a frog is called a:

   A.Chick

   B.Larva of silkworm

   C.Calf

   D.Tadpole✓ Correct

   Answer: D. Tadpole

   Explanation: A frog's egg hatches into a tadpole, which changes into an adult frog.

6. Q6Easy

   Reproduction involving a single parent with no fusion of gametes is called:

   A.Asexual reproduction✓ Correct

   B.Sexual reproduction

   C.Fertilisation

   D.Metamorphosis

   Answer: A. Asexual reproduction

   Explanation: Asexual reproduction needs only one parent and no gametes, e.g. budding and fission.

7. Q7Medium

   How does sexual reproduction differ from asexual reproduction?

   A.Sexual needs no parents

   B.Both need two parents

   C.Asexual always uses sperm and egg

   D.Sexual needs two parents and gamete fusion; asexual needs one parent and no gametes✓ Correct

   Answer: D. Sexual needs two parents and gamete fusion; asexual needs one parent and no gametes

   Explanation: Sexual reproduction involves two parents and fusion of gametes; asexual involves a single parent without gametes.

8. Q8Medium

   Why does external fertilisation usually involve the release of a very large number of eggs?

   A.Many eggs are wasted or eaten, so large numbers raise the chance of survival✓ Correct

   B.Water dissolves eggs

   C.Eggs are heavy

   D.Eggs cannot move

   Answer: A. Many eggs are wasted or eaten, so large numbers raise the chance of survival

   Explanation: In water, many eggs are lost to predators and currents, so producing many improves survival odds.

9. Q9Medium

   Why do oviparous animals often have a protective shell around their eggs?

   A.To make the egg heavier

   B.To protect the developing embryo outside the mother's body✓ Correct

   C.To help the egg swim

   D.To attract predators

   Answer: B. To protect the developing embryo outside the mother's body

   Explanation: Since the embryo develops outside, a shell protects it from harm while it grows.

10. Q10Medium

    In binary fission, a single parent cell:

    A.Joins another cell

    B.Lays eggs

    C.Divides into two daughter cells✓ Correct

    D.Produces sperms

    Answer: C. Divides into two daughter cells

    Explanation: In binary fission the parent divides into two new individuals, as in Amoeba.

11. Q11Medium

    Which sequence shows the correct development of a human after fertilisation?

    A.Embryo → zygote → foetus

    B.Zygote → embryo → foetus → baby✓ Correct

    C.Sperm → foetus → zygote

    D.Foetus → embryo → zygote

    Answer: B. Zygote → embryo → foetus → baby

    Explanation: The zygote forms an embryo, which becomes a foetus and finally a baby.

12. Q12Hard

    A gardener cuts a Hydra into two pieces and each regrows into a full Hydra. This regeneration is most similar to which mode of reproduction?

    A.Asexual reproduction from a single parent✓ Correct

    B.Sexual reproduction needing two parents

    C.Internal fertilisation

    D.Metamorphosis

    Answer: A. Asexual reproduction from a single parent

    Explanation: New individuals arising from one parent without gametes is asexual, like Hydra's budding/regeneration.

13. Q13Hard

    Assertion (A): Fish and frogs release thousands of eggs. Reason (R): External fertilisation in water has a high loss of eggs, so large numbers improve survival. Choose the correct option.

    A.A is true, R is false

    B.Both A and R are true and R explains A✓ Correct

    C.A is false, R is true

    D.Both A and R are false

    Answer: B. Both A and R are true and R explains A

    Explanation: Heavy egg loss in water is exactly why so many eggs are released — R explains A.

14. Q14Hard

    Which statement correctly distinguishes oviparous and viviparous animals?

    A.Oviparous give birth to young; viviparous lay eggs

    B.Both lay eggs

    C.Both give birth to live young

    D.Oviparous lay eggs in which the embryo develops; viviparous give birth to live young✓ Correct

    Answer: D. Oviparous lay eggs in which the embryo develops; viviparous give birth to live young

    Explanation: Oviparous animals lay eggs; viviparous animals give birth to live young.

Reproduction in Animals — FAQs

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