NCERT Class 9 Science MCQ | Chapter 11: Reproduction: How Life Continues
1. Reproduction is the biological process by which living beings:
(A) obtain food
(B) produce new individuals of their own kind
(C) increase in size
(D) remove waste
Answer: (B)
2. Which type of reproduction involves only one parent?
(A) Sexual reproduction
(B) Asexual reproduction
(C) Cross-pollination
(D) Fertilisation
Answer: (B)
3. Asexual reproduction generally produces offspring that are:
(A) genetically identical to the parent
(B) always genetically different
(C) produced by two parents
(D) produced only through seeds
Answer: (A)
4. Which of the following is an example of vegetative propagation?
(A) Formation of zygote
(B) Potato producing a new plant
(C) Fertilisation in flowers
(D) Formation of seeds after fertilisation
Answer: (B)
5. Bryophyllum can reproduce vegetatively through:
(A) roots
(B) flowers
(C) leaves
(D) seeds only
Answer: (C)
6. Which of the following is NOT a method of vegetative propagation mentioned in the chapter?
(A) Cutting
(B) Grafting
(C) Layering
(D) Fertilisation
Answer: (D)
7. In grafting, a stem piece from one plant is inserted into:
(A) a seed
(B) a slit or wound in another plant
(C) a flower
(D) a fruit
Answer: (B)
8. In layering, the middle part of a flexible twig is:
(A) placed in water
(B) buried under the soil
(C) removed completely
(D) converted into a seed
Answer: (B)
9. In layering, roots generally develop from the buried part of the twig after about:
(A) 1–2 hours
(B) 1–2 days
(C) 10–15 days
(D) 6 months
Answer: (C)
10. Tissue culture is an example of:
(A) sexual reproduction
(B) asexual reproduction
(C) external fertilisation
(D) cross-pollination
Answer: (B)
11. In yeast, a small outgrowth that develops from the parent cell is called:
(A) spore
(B) bud
(C) seed
(D) gamete
Answer: (B)
12. The asexual reproduction method in Hydra is called:
(A) budding
(B) fertilisation
(C) pollination
(D) layering
Answer: (A)
13. Louis Pasteur’s experiments supported the idea that:
(A) life always arises spontaneously
(B) new life comes from pre-existing life
(C) all organisms reproduce sexually
(D) microorganisms cannot reproduce
Answer: (B)
14. The asexual reproduction method involving spores is commonly seen in:
(A) fungi
(B) mammals
(C) birds
(D) humans
Answer: (A)
15. Spores of mould are generally:
(A) heavy and unable to move through air
(B) lightweight and easily carried by air currents
(C) produced only inside animals
(D) formed only in water
Answer: (B)
16. The central process behind asexual reproduction described in the chapter is:
(A) meiosis
(B) mitosis
(C) fertilisation
(D) pollination
Answer: (B)
17. Offspring produced through asexual reproduction are called clones because they are:
(A) always larger than their parents
(B) genetically identical to the parent
(C) produced by two parents
(D) formed only by meiosis
Answer: (B)
18. Sexual reproduction generally involves:
(A) one parent
(B) two parents
(C) no parents
(D) only microorganisms
Answer: (B)
19. The special type of cell division that reduces chromosome number to half is:
(A) mitosis
(B) meiosis
(C) budding
(D) binary fission
Answer: (B)
20. Human body cells normally contain:
(A) 23 chromosomes
(B) 46 chromosomes
(C) 44 chromosomes
(D) 92 chromosomes
Answer: (B)
21. Human gametes contain:
(A) 46 chromosomes
(B) 23 chromosomes
(C) 92 chromosomes
(D) 44 chromosomes
Answer: (B)
22. The male gamete in humans is:
(A) egg
(B) sperm
(C) zygote
(D) embryo
Answer: (B)
23. The female gamete in humans is:
(A) sperm
(B) egg
(C) embryo
(D) foetus
Answer: (B)
24. The male reproductive part of a flower is:
(A) pistil
(B) stamen
(C) ovary
(D) stigma
Answer: (B)
25. The female reproductive part of a flower is:
(A) stamen
(B) filament
(C) pistil
(D) anther
Answer: (C)
26. The anther produces:
(A) ovules
(B) pollen grains
(C) seeds
(D) fruits
Answer: (B)
27. The pistil consists of:
(A) stigma, style and ovary
(B) anther, filament and ovary
(C) petal, sepal and anther
(D) filament, ovule and petal
Answer: (A)
28. The transfer of pollen grains from anther to stigma is called:
(A) fertilisation
(B) pollination
(C) germination
(D) budding
Answer: (B)
29. When pollen is transferred to the stigma of the same flower or another flower of the same plant, it is called:
(A) cross-pollination
(B) self-pollination
(C) fertilisation
(D) artificial hybridisation
Answer: (B)
30. Transfer of pollen from one plant to another plant of the same type is called:
(A) self-pollination
(B) cross-pollination
(C) budding
(D) tissue culture
Answer: (B)
31. Which of the following can act as a pollinating agent?
(A) Wind
(B) Water
(C) Insects
(D) All of these
Answer: (D)
32. In wind-pollinated plants such as wheat and maize, pollen grains are generally:
(A) large and sticky
(B) light and small
(C) heavy and wet
(D) absent
Answer: (B)
33. In insect-pollinated flowers, nectar and fragrance mainly help to:
(A) destroy pollen
(B) attract pollinators
(C) prevent fertilisation
(D) stop seed formation
Answer: (B)
34. During fertilisation in flowering plants, the male gamete fuses with:
(A) pollen grain
(B) egg cell
(C) stigma
(D) sepal
Answer: (B)
35. The fertilised egg is called:
(A) embryo
(B) zygote
(C) ovule
(D) pollen
Answer: (B)
36. After fertilisation in a flowering plant, the ovule develops into a:
(A) fruit
(B) seed
(C) flower
(D) stigma
Answer: (B)
37. After fertilisation, the ovary develops into a:
(A) seed
(B) fruit
(C) pollen grain
(D) root
Answer: (B)
38. In humans, sperm are produced in the:
(A) ovaries
(B) testes
(C) uterus
(D) prostate gland
Answer: (B)
39. The scrotum helps in sperm formation by keeping the testes:
(A) warmer than normal body temperature
(B) slightly cooler than normal body temperature
(C) at freezing temperature
(D) completely dry
Answer: (B)
40. The tube through which sperm travel from the testes is called:
(A) oviduct
(B) vas deferens
(C) ureter
(D) cervix
Answer: (B)
41. The female reproductive system includes:
(A) testes, vas deferens and urethra
(B) ovaries, oviducts, uterus and vagina
(C) testes, prostate and scrotum
(D) anther, filament and ovary
Answer: (B)
42. The uterus is the organ where:
(A) sperm are produced
(B) the foetus develops
(C) eggs are produced
(D) pollen grains are formed
Answer: (B)
43. The process of formation of gametes is called:
(A) fertilisation
(B) gametogenesis
(C) pollination
(D) implantation
Answer: (B)
44. In humans, usually one mature egg is released from an ovary approximately every:
(A) week
(B) month
(C) six months
(D) two years
Answer: (B)
45. The release of a mature egg from an ovary is called:
(A) fertilisation
(B) ovulation
(C) menstruation
(D) implantation
Answer: (B)
46. If a sperm successfully fuses with an egg, the result is the formation of:
(A) pollen
(B) zygote
(C) ovule
(D) sperm
Answer: (B)
47. The process in which the uterine lining is shed when fertilisation does not occur is called:
(A) ovulation
(B) menstruation
(C) fertilisation
(D) implantation
Answer: (B)
48. The typical menstrual cycle is approximately:
(A) 7 days
(B) 14 days
(C) 28 days
(D) 60 days
Answer: (C)
49. Which of the following is a barrier contraceptive method mentioned in the chapter?
(A) Condom
(B) Copper-T
(C) Oral pill
(D) Surgery only
Answer: (A)
50. Which of the following helps prevent the transmission of sexually transmitted infections as well as pregnancy?
(A) Oral contraceptive pills
(B) Copper-T
(C) Condoms
(D) Ovulation
Answer: (C)
NCERT Class 9 Science MCQ | Chapter 11: Reproduction: How Life Continues
ASSERTION–REASON QUESTIONS
Directions: Choose the correct option:
(A) Both A and R are true, and R is the correct explanation of A.
(B) Both A and R are true, but R is not the correct explanation of A.
(C) A is true, but R is false.
(D) A is false, but R is true.
- Assertion (A): Asexual reproduction produces offspring that are genetically identical to the parent.
Reason (R): Asexual reproduction involves only one parent and the offspring arise through mitotic cell division.
Answer: (A)
- Assertion (A): Vegetative propagation is useful for producing large numbers of desirable plants.
Reason (R): Vegetative propagation can produce genetically identical plants from the parent plant.
Answer: (A)
- Assertion (A): Meiosis is important in sexual reproduction.
Reason (R): Meiosis reduces the chromosome number to half in the gametes.
Answer: (A)
- Assertion (A): Human sperm and egg cells contain 46 chromosomes each.
Reason (R): Meiosis reduces the chromosome number by half during gamete formation.
Answer: (D)
- Assertion (A): The stamen is the male reproductive part of a flower.
Reason (R): The anther of the stamen produces pollen grains containing male gametes.
Answer: (A)
- Assertion (A): Cross-pollination can occur between flowers of two plants of the same type.
Reason (R): Cross-pollination involves the transfer of pollen from a flower of one plant to the stigma of a flower of another plant of the same type.
Answer: (A)
- Assertion (A): After fertilisation, the ovule develops into a fruit.
Reason (R): After fertilisation, the ovary develops into a fruit and the ovules develop into seeds.
Answer: (D)
- Assertion (A): The testes are located in the scrotum.
Reason (R): The scrotum keeps the testes slightly cooler than normal body temperature, which is necessary for sperm formation.
Answer: (A)
- Assertion (A): Ovulation is the release of a mature egg from an ovary.
Reason (R): In humans, usually one mature egg is released every month from one of the ovaries.
Answer: (B)
- Assertion (A): Internal fertilisation generally provides greater protection to the developing embryo than external fertilisation.
Reason (R): In internal fertilisation, fertilisation takes place inside the body of the female and the fertilised egg or embryo is more protected.
Answer: (A)
