How do Organisms Reproduce? — Class 10 MCQs with Answers

How do Organisms Reproduce? — important questions & MCQs with answers (Class 10 Science (Biology))

14 solved questions from this chapter's difficulty levels, each with its answer and explanation. The other 76 are timed and scored when you sign in.

1. Q1Easy

   Amoeba reproduces by:

   A.Binary fission✓ Correct

   B.Budding

   C.Spore formation

   D.Fertilisation

   Answer: A. Binary fission

   Explanation: Amoeba undergoes binary fission, splitting its single cell into two roughly equal daughter cells; unlike budding, no smaller outgrowth develops first.

2. Q2Easy

   Reproduction is the process of:

   A.Producing offspring✓ Correct

   B.Obtaining food

   C.Excretion

   D.Respiration

   Answer: A. Producing offspring

   Explanation: Reproduction is the process by which organisms produce offspring like themselves, ensuring their species continues — unlike feeding, excretion or respiration, which sustain only the individual.

3. Q3Easy

   Male reproductive part of a flower is called:

   A.Stamen✓ Correct

   B.Pistil

   C.Petal

   D.Sepal

   Answer: A. Stamen

   Explanation: The stamen, made of anther and filament, is the flower's male reproductive part; the anther produces pollen grains that carry the male gametes.

4. Q4Easy

   Transfer of pollen from anther to stigma is called:

   A.Germination

   B.Fertilisation

   C.Pollination✓ Correct

   D.Pollen tube formation

   Answer: C. Pollination

   Explanation: Pollination is simply the transfer of pollen grains from the anther to a stigma; fertilisation, the actual fusion of male and female gametes, happens only afterward via the pollen tube.

5. Q5Easy

   Male gametes (sperm) are produced by:

   A.Testes✓ Correct

   B.Ovaries

   C.Uterus

   D.Prostate

   Answer: A. Testes

   Explanation: Sperm, the male gametes, are produced in the testes through spermatogenesis; the prostate only adds fluid to semen and does not itself make sperm.

6. Q6Easy

   Condoms primarily prevent:

   A.Hormonal cycle

   B.Implantation

   C.Sperm from reaching ovum✓ Correct

   D.Ovulation

   Answer: C. Sperm from reaching ovum

   Explanation: A condom is a barrier method that physically stops sperm from entering the vagina and reaching the ovum, preventing fertilisation rather than affecting hormones or ovulation.

7. Q7Medium

   Difference between binary and multiple fission:

   A.Both give the same number

   B.Binary gives 2; multiple gives many daughter cells✓ Correct

   C.Binary only in eukaryotes

   D.Multiple only in bacteria

   Answer: B. Binary gives 2; multiple gives many daughter cells

   Explanation: Binary fission produces exactly two daughter cells from one division, while multiple fission divides the nucleus repeatedly first, so a single parent cell yields many daughter cells at once.

8. Q8Medium

   DNA copying with slight variations during reproduction is essential because:

   A.It reduces genetic material

   B.It increases offspring weight

   C.It speeds growth

   D.It provides variations needed for evolution✓ Correct

   Answer: D. It provides variations needed for evolution

   Explanation: DNA copying during reproduction is never perfectly exact, and these small variations are the raw material natural selection acts on, letting a species adapt when its environment changes.

9. Q9Medium

   Papaya and watermelon flowers are:

   A.Unisexual✓ Correct

   B.Bisexual

   C.Sterile

   D.All in one

   Answer: A. Unisexual

   Explanation: Papaya and watermelon bear unisexual flowers — each flower has either stamens or a pistil, never both — unlike bisexual flowers such as hibiscus that carry both in one flower.

10. Q10Medium

    Pollination from anther to stigma of the same flower is:

    A.Cross-pollination

    B.Self-pollination✓ Correct

    C.Wind pollination only

    D.Hydrophily

    Answer: B. Self-pollination

    Explanation: Transfer of pollen from the anther to the stigma of the same flower is self-pollination.

11. Q11Medium

    Puberty is marked by:

    A.Birth

    B.Maturation of sex organs and appearance of secondary sexual characters✓ Correct

    C.Tooth growth

    D.Increase in height alone

    Answer: B. Maturation of sex organs and appearance of secondary sexual characters

    Explanation: Puberty is when the sex organs mature and secondary sexual characters appear, brought about by sex hormones.

12. Q12Hard

    Vegetative propagation in potato occurs through:

    A.Roots

    B.Stem (eyes/buds on tuber)✓ Correct

    C.Leaves

    D.Seeds

    Answer: B. Stem (eyes/buds on tuber)

    Explanation: A potato tuber is a swollen underground stem, not a root, and each 'eye' is a bud that can sprout a new plant — this bud-bearing structure is what makes potato propagation vegetative.

13. Q13Hard

    Asexual reproduction has the advantage of:

    A.More variation

    B.Rapid production of identical offspring✓ Correct

    C.Mixing of genes

    D.Both parents required

    Answer: B. Rapid production of identical offspring

    Explanation: Asexual reproduction needs only one parent and no gamete search, so a population can multiply quickly in a stable environment — the trade-off is offspring that are genetically identical, with no new variation.

14. Q14Hard

    Pollen tube grows down through:

    A.Style to reach the ovary✓ Correct

    B.Anther

    C.Filament

    D.Sepals

    Answer: A. Style to reach the ovary

    Explanation: After pollination, the pollen tube grows down through the style, guided toward the ovary, carrying the non-motile male gametes to the ovule for fertilisation.

How do Organisms Reproduce? — FAQs

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• 02Acids, Bases and Salts
• 03Metals and Non-metals
• 04Carbon and Its Compounds
• 05Life Processes
• 06Control and Coordination

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