How Do Organisms Reproduce? – 50 Hard MCQs

How Do Organisms Reproduce? – 50 Hard MCQs

Asexual Reproduction

1. Reproduction in Amoeba occurs by:

(a) Binary fission

(b) Multiple fission

(c) Budding

(d) Fragmentation

2. In Plasmodium, reproduction occurs by:

(a) Binary fission

(b) Multiple fission

(c) Budding

(d) Sporulation

3. Which of the following reproduces by budding?

(a) Yeast

(b) Hydra

(c) Both (a) and (b)

(d) Paramecium

4. Which is an example of vegetative propagation by leaf?

(a) Potato

(b) Bryophyllum

(c) Ginger

(d) Onion

5. Runners, tubers and bulbs are examples of:

(a) Sexual reproduction

(b) Asexual reproduction

(c) Both sexual and asexual

(d) None

6. Spores are produced in:

(a) Yeast

(b) Rhizopus

(c) Hydra

(d) Planaria

7. Which is NOT a natural method of vegetative propagation?

(a) Rhizome

(b) Cutting

(c) Tuber

(d) Sucker

8. Which part of potato is involved in reproduction?

(a) Root

(b) Stem

(c) Leaf

(d) Flower

9. Grafting is a method of:

(a) Sexual reproduction

(b) Artificial vegetative propagation

(c) Pollination

(d) Cross fertilisation

10. Which advantage does vegetative propagation provide?

(a) Large genetic variation

(b) New varieties can be developed

(c) Faster and identical offspring

(d) None

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Sexual Reproduction in Plants

11. Which structure in flower produces pollen grains?

(a) Anther

(b) Stigma

(c) Ovary

(d) Style

12. Which structure of flower traps pollen grain?

(a) Anther

(b) Stigma

(c) Ovary

(d) Sepal

13. Transfer of pollen from anther to stigma is:

(a) Fertilisation

(b) Pollination

(c) Seed formation

(d) Germination

14. Fusion of male and female gametes is:

(a) Fertilisation

(b) Pollination

(c) Reproduction

(d) Germination

15. In angiosperms, double fertilisation involves:

(a) Two eggs + one sperm

(b) Two sperms + two cells of embryo sac

(c) One sperm + one egg only

(d) Fusion of pollen grains

16. Embryo sac of an angiosperm has:

(a) One nucleus

(b) Two nuclei

(c) Eight nuclei

(d) Four nuclei

17. Which part of flower develops into fruit?

(a) Ovule

(b) Ovary

(c) Anther

(d) Sepal

18. Seed is formed from:

(a) Ovary

(b) Ovule

(c) Anther

(d) Stigma

19. Which part provides nutrition to the embryo in seed?

(a) Endosperm

(b) Cotyledon

(c) Plumule

(d) Radicle

20. Which condition favours self-pollination?

(a) Flowers on different plants

(b) Flowers with only stamens

(c) Bisexual flowers

(d) Cross-breeding

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Sexual Reproduction in Humans

21. Testes are located outside abdominal cavity because:

(a) To increase testosterone production

(b) Sperms need lower temperature

(c) They cannot grow inside body

(d) To avoid infection

22. Which cells in testes produce testosterone?

(a) Leydig cells

(b) Sertoli cells

(c) Germ cells

(d) Epithelial cells

23. Which structure in male provides nourishment to sperms?

(a) Vas deferens

(b) Prostate gland

(c) Seminal vesicle

(d) Epididymis

24. Which structure in female produces eggs?

(a) Oviduct

(b) Ovary

(c) Uterus

(d) Cervix

25. Fertilisation in humans occurs in:

(a) Ovary

(b) Fallopian tube

(c) Uterus

(d) Vagina

26. Implantation of embryo occurs in:

(a) Ovary

(b) Fallopian tube

(c) Uterus

(d) Cervix

27. Placenta is formed by:

(a) Embryo only

(b) Uterine wall only

(c) Both embryo and uterine tissue

(d) Umbilical cord

28. Which hormone maintains pregnancy?

(a) Progesterone

(b) Oestrogen

(c) LH

(d) FSH

29. Menstrual cycle is regulated by:

(a) Pituitary and thyroid

(b) Pituitary and ovary

(c) Ovary and pancreas

(d) Thyroid and pancreas

30. Which day of menstrual cycle usually involves ovulation?

(a) 1st day

(b) 7th day

(c) 14th day

(d) 28th day

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Reproductive Health

31. Oral contraceptive pills mainly work by:

(a) Killing sperms

(b) Blocking oviduct

(c) Changing hormonal balance

(d) Preventing implantation only

32. Surgical method of birth control in males is:

(a) Vasectomy

(b) Tubectomy

(c) Coitus interruptus

(d) Condom

33. Surgical method of birth control in females is:

(a) Vasectomy

(b) Tubectomy

(c) Condom

(d) Diaphragm

34. STD caused by virus is:

(a) Gonorrhoea

(b) Syphilis

(c) AIDS

(d) Both (a) and (b)

35. Which is not a method of contraception?

(a) IUCD

(b) Condoms

(c) Vaccination

(d) Pills

36. Condoms prevent pregnancy by:

(a) Blocking release of ovum

(b) Killing sperms

(c) Preventing sperm entry into uterus

(d) Preventing fertilisation in ovary

37. Which of the following prevents implantation of zygote?

(a) IUCD (Copper-T)

(b) Condom

(c) Vasectomy

(d) Tubectomy

38. Which is a temporary method of birth control?

(a) Tubectomy

(b) Condom

(c) Vasectomy

(d) All of these

39. Which STD is caused by bacteria?

(a) AIDS

(b) Gonorrhoea

(c) Hepatitis B

(d) Herpes

40. Which statement about contraception is INCORRECT?

(a) Condom prevents STDs

(b) Vasectomy is reversible easily

(c) Pills alter hormones

(d) IUCD prevents implantation

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Genetics & Variations

41. The main advantage of sexual reproduction is:

(a) Rapid increase of population

(b) Production of variation

(c) Less time required

(d) Uniform offspring

42. Which process ensures genetic variation in offspring?

(a) Mitosis

(b) Meiosis

(c) Binary fission

(d) Budding

43. Which type of reproduction favours evolution?

(a) Sexual

(b) Asexual

(c) Both

(d) None

44. Vegetative propagation is used in agriculture mainly for:

(a) More variation

(b) Uniform quality and faster yield

(c) Producing seeds

(d) Increasing genetic recombination

45. Offspring produced by asexual reproduction are genetically:

(a) Different

(b) Identical

(c) Both

(d) None

46. In human males, which pair of chromosomes is present?

(a) XX

(b) XY

(c) YY

(d) XO

47. Sex of a child is determined by:

(a) Mother’s gamete

(b) Father’s gamete

(c) Both equally

(d) Environment

48. Which chromosome is responsible for male character in humans?

(a) X

(b) Y

(c) Both X and Y

(d) None

49. Which statement is correct?

(a) Father always gives X chromosome to child

(b) Mother always gives Y chromosome to child

(c) Mother always gives X chromosome

(d) Father always gives two X chromosomes

50. Variation is more in:

(a) Asexual reproduction

(b) Sexual reproduction

(c) Both equally

(d) Vegetative propagation

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✅ Answer Key

1-a, 2-b, 3-c, 4-b, 5-b

6-b, 7-b, 8-b, 9-b, 10-c

11-a, 12-b, 13-b, 14-a, 15-b

16-c, 17-b, 18-b, 19-a, 20-c

21-b, 22-a, 23-c, 24-b, 25-b

26-c, 27-c, 28-a, 29-b, 30-c

31-c, 32-a, 33-b, 34-c, 35-c

36-c, 37-a, 38-b, 39-b, 40-b

41-b, 42-b, 43-a, 44-b, 45-b

46-b, 47-b, 48-b, 49-c, 50-b

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