Reproduction is a vital biological process that allows organisms to produce offspring, ensuring the continuation of their species. The Bihar Board Class 12th Biology chapter “Reproduction in Organisms” explains the lifespan of organisms, different reproductive strategies, and the importance of both sexual and asexual reproduction.
Below are 50 important objective questions with options and one-word answers for quick exam preparation.
Reproduction in Organisms – Bihar Board Class 12 Biology Objective Questions with Answers
1. The process by which organisms give rise to offspring is called—
Options: a) Respiration b) Digestion c) Reproduction d) Metabolism
Answer: Reproduction
2. The lifespan of organisms is—
Options: a) Same for all b) Variable c) Always short d) None
Answer: Variable
3. Asexual reproduction involves—
Options: a) Two parents b) One parent c) Gamete formation d) Fertilization
Answer: One
4. Sexual reproduction requires—
Options: a) One parent b) Two parents c) Budding d) Fission
Answer: Two
5. The period from birth to natural death is called—
Options: a) Life cycle b) Life span c) Life process d) Life duration
Answer: Life span
6. Binary fission occurs in—
Options: a) Amoeba b) Hydra c) Yeast d) Bryophyllum
Answer: Amoeba
7. Budding is observed in—
Options: a) Amoeba b) Hydra c) Paramecium d) Euglena
Answer: Hydra
8. Vegetative propagation occurs in—
Options: a) Animals b) Bacteria c) Plants d) Fungi
Answer: Plants
9. The reproductive phase of an organism is called—
Options: a) Juvenile b) Reproductive c) Senescent d) Dormant
Answer: Reproductive
10. The phase of decline in reproduction is known as—
Options: a) Juvenile b) Senescent c) Mature d) Reproductive
Answer: Senescent
11. In yeast, reproduction takes place by—
Options: a) Budding b) Fission c) Spore formation d) Fragmentation
Answer: Budding
12. Fragmentation is common in—
Options: a) Amoeba b) Spirogyra c) Yeast d) Hydra
Answer: Spirogyra
13. Clones are—
Options: a) Genetically different b) Genetically identical c) Morphologically different d) Physiologically different
Answer: Identical
14. Oviparous animals lay—
Options: a) Eggs b) Young ones c) Both d) None
Answer: Eggs
15. Viviparous animals give birth to—
Options: a) Eggs b) Young ones c) Spores d) Larvae
Answer: Young
16. The offspring produced by asexual reproduction are—
Options: a) Identical b) Different c) Hybrid d) None
Answer: Identical
17. Meiosis occurs during—
Options: a) Asexual reproduction b) Sexual reproduction c) Vegetative propagation d) Cloning
Answer: Sexual
18. Fertilization is the fusion of—
Options: a) Egg and ovary b) Egg and sperm c) Two eggs d) Two sperms
Answer: Egg and sperm
19. Zygote develops into—
Options: a) Gamete b) Embryo c) Spore d) Ovule
Answer: Embryo
20. External fertilization occurs in—
Options: a) Humans b) Frog c) Dog d) Cow
Answer: Frog
21. Internal fertilization occurs in—
Options: a) Fish b) Frog c) Humans d) Starfish
Answer: Humans
22. Sexual reproduction promotes—
Options: a) Genetic variation b) Cloning c) Uniformity d) None
Answer: Variation
23. The basic unit of inheritance is—
Options: a) Gene b) Cell c) Chromosome d) Gamete
Answer: Gene
24. Reproduction that involves gamete fusion is—
Options: a) Asexual b) Sexual c) Budding d) Vegetative
Answer: Sexual
25. The motile male gamete is called—
Options: a) Ovum b) Sperm c) Egg d) Zygote
Answer: Sperm
26. The non-motile female gamete is—
Options: a) Ovum b) Sperm c) Spore d) Zygote
Answer: Ovum
27. Life span of crow is around—
Options: a) 5 years b) 15 years c) 30 years d) 50 years
Answer: 15 years
28. Banana reproduces by—
Options: a) Seeds b) Suckers c) Buds d) Spores
Answer: Suckers
29. Bryophyllum reproduces by—
Options: a) Leaf buds b) Stem c) Root d) Flower
Answer: Leaf buds
30. Potato reproduces by—
Options: a) Tubers b) Seeds c) Bulbs d) Rhizome
Answer: Tubers
31. Onion reproduces by—
Options: a) Bulbs b) Rhizome c) Seed d) Root
Answer: Bulbs
32. Ginger reproduces by—
Options: a) Rhizome b) Seed c) Stem d) Root
Answer: Rhizome
33. Asexual reproduction produces—
Options: a) Slow increase b) Rapid increase c) No increase d) Hybrid forms
Answer: Rapid
34. Parthenogenesis means—
Options: a) Development without fertilization b) Bud formation c) Spore formation d) Fusion of gametes
Answer: Without fertilization
35. Example of parthenogenetic animal—
Options: a) Honeybee b) Frog c) Human d) Dog
Answer: Honeybee
36. Male gamete is produced by—
Options: a) Testes b) Ovary c) Uterus d) Oviduct
Answer: Testes
37. Female gamete is produced by—
Options: a) Ovary b) Testes c) Uterus d) Vagina
Answer: Ovary
38. The zygote is—
Options: a) Haploid b) Diploid c) Triploid d) Polyploid
Answer: Diploid
39. Example of organism showing both sexual and asexual reproduction—
Options: a) Amoeba b) Hydra c) Paramecium d) Yeast
Answer: Hydra
40. The number of chromosomes in gametes is—
Options: a) Haploid b) Diploid c) Triploid d) None
Answer: Haploid
41. Clone term was given by—
Options: a) Herbert Spencer b) H. J. Muller c) Morgan d) Aristotle
Answer: H. J. Muller
42. Sexual reproduction occurs in—
Options: a) Higher plants b) Animals c) Both d) None
Answer: Both
43. The male reproductive organ in flower is—
Options: a) Stamen b) Carpel c) Ovary d) Sepal
Answer: Stamen
44. The female reproductive organ in flower is—
Options: a) Carpel b) Sepal c) Petal d) Anther
Answer: Carpel
45. The transfer of pollen grains is called—
Options: a) Germination b) Pollination c) Fertilization d) Reproduction
Answer: Pollination
46. The union of male and female gametes is called—
Options: a) Pollination b) Fertilization c) Reproduction d) Germination
Answer: Fertilization
47. Asexual reproduction results in—
Options: a) No variation b) Variation c) Mutation d) Adaptation
Answer: No variation
48. The genetic material is—
Options: a) DNA b) Protein c) Lipid d) Carbohydrate
Answer: DNA
49. The life span of a butterfly is about—
Options: a) 1 day b) 1 week c) 2 weeks d) 1 month
Answer: 2 weeks
50. Human life span is approximately—
Options: a) 10 years b) 25 years c) 70 years d) 150 years
Answer: 70 years
FAQs-Reproduction in Organisms
1. What is reproduction?
Reproduction is the biological process through which organisms produce offspring of their own kind.
2. What are the two main types of reproduction?
Asexual reproduction and Sexual reproduction.
3. What is the lifespan of an organism?
It is the period from birth to natural death.
4. Name one organism that reproduces by budding.
Hydra.
5. What is the advantage of sexual reproduction?
It introduces genetic variation among offspring.
6. What is parthenogenesis?
It is development of an egg without fertilization, seen in honeybees.
7. What are clones?
Clones are genetically identical individuals produced through asexual reproduction.
8. Which part of the flower is the male reproductive organ?
Stamen.
9. Which part of the flower is the female reproductive organ?
Carpel or Pistil.
10. Why is reproduction important for living organisms?
It ensures the survival and continuity of species on Earth.
Conclusion:
The chapter “Reproduction in Organisms” forms the foundation of biology by explaining how life continues generation after generation. Studying these objective questions and FAQs will help Bihar Board Class 12 students score high marks in their biology exams.