12th Biology chapter 1: full solution, notes, MCQ, & free PDF | Bihar board

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12th Biology chapter 1: cover all important question with new latest pattern. you can download Biology chapter 1 notes & full solution as PDF format in English. below we are goin to cover chapter 1 Biology class 12 Bihar board
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12th Biology chapter 1 Bihar board with NCERT-Details & Highlights

name of content 12th Biology chapter 1 full solution
content Biology objective type MCQ question with answer
name of subjects  class 12 Biology
important for exam Bihar board & other state board
pattern & Level  NCERT & State level question

12th Biology chapter 1 all objective solutions – download PDF

1.  The process of formation of gametes is called

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    • (a) Gametogenesis
    • (b) Cytokinesis
    • (c) Sporogenesis
    • (d) Meiocytes

Ans (A)

2. The menstrualcycle occurs in 

    • (a) Human
    • (b) Apes
    • (c) Both
    • (d) None of the above

Ans (C)

3. Which are does not show Ostrus cycle 

    • (a) Dog
    • (b) Cow
    • (c) Monkey
    • (d) None of the above

Ans (C)

4. Amoeba reproduces by 

    • (a) Binary fission
    • (b) Buds
    • (c) Conidia
    • (d) None of the above

Ans (A)

5. Which one is not bisexual 

    • (a) Leech
    • (b) Tapeworm
    • (c) Dog
    • (d) None of the above

Ans (C)

6. The process of development of the embryo is called 

    • (a) Sporogenesis
    • (b) Embryogenesis
    • (c) Vivipary
    • (d) None of the above

Ans (B)

7. The fusion of gametes is called 

    • (a) Syngamyn
    • (b) Pollination
    • (c) Parthenogenesis
    • (d) None of the above

Ans (A)

8. How many chromosomes are present in a human gamete 

    • (a) 46
    • (b) 48
    • (c) 23
    • (d) None of the above

Ans (C)

9. Which is not unisexual 

    • (a) Cow
    • (b) Dog
    • (c) Earthworm
    • (d) All of the above

Ans (C)

10. What is fertilization? 

    • (a) The fusion of egg with male nuclei.
    • (b) The fusion of egg with secondary nucleus
    • (c) The fusion of egg with synergid
    • (d) None of these

Ans (B)

11. Oviparous are 

    • (a) hen
    • (b) snake
    • (c) crocodile
    • (d) all of these

Ans (D)

BSEB 12th Biology chapter 1 class 12

12. Copulatory organs are not formed in 

    • (a) mammals
    • (b) reptiles
    • (c) octopus
    • (d) birds

Ans (C)

13. In which of the following alternation of generations, the main plant is a gametophyte?

    • (a) Haplontic
    • (b) Diplontic
    • (c) Haplo-diplontic
    • (d) None of these

Ans (A)

14. In which of the following, calyx covers the whole fruit? 

    • (a) Physalis
    • (b) Tomato
    • (c) Brinjal
    • (d) Litchi

Ans (A)

15. The Oestrus cycle occurs in 

    • (a) dog
    • (b) cow
    • (c) buffalo
    • (d) all of these

Ans (D)

16. Which one of these is haploid? 

    • (a) Egg
    • (b) Zygote
    • (c) Integument
    • (d) Nucellus

Ans (A)

17. Which one of these is diploid? 

    • (a) Egg
    • (b) Pollen
    • (c) Male gamete
    • (d) Zygote

Ans (D)

18. In which of the following plant body is a gametophyte? 

    • (a) Algae
    • (b) Fungi
    • (c) Bryophytes
    • (d) All of these

Ans (D)

19. Which of the following is oviparous? 

    • (a) Crocodile
    • (b) Snake
    • (c) Hen
    • (d) All of these

Ans (D)

20. Diploid chromosome number in potato is 

    • (a) 34
    • (b) 40
    • (c) 48
    • (d) 32

Ans (C)

21. Haploid chromosome number in a dog is 

    • (a) 23
    • (b) 39
    • (c) 19
    • (d) 4

Ans (B)

12th Biology chapter 1 bihar board

22. The multiplication of genetically identical copies of a cultivar by asexual means is called

    • (a) mass culture of plant cells
    • (b) organogenesis
    • (c) clonal variation
    • (d) None of these

Ans (C)

23. Parthenogenesis is the development of 

    • (a) fruit without hormones
    • (b) embryo without fertilization
    • (c) embryo from an egg without fertilization
    • (d) fruit without fertilization

Ans (C)

24. Upon fertilization, while the ovule develops into a seed, which structure develops from the carpel?

    • (a) Perisperm
    • (b) Pericarp
    • (c) Testa
    • (d) None of these

Ans (B)

25. Which one is not an oviparous animal? 

    • (a) Snake
    • (b) Chicken
    • (c) Crocodile
    • (d) Human

Ans (D)

26. Which of the following is incorrect? 

    • (a) The length of time which an organism is likely to live is called its life span.
    • (b) Binary fission takes place in Bacteria and Amoeba.
    • (c) Hydra reproduces asexually by budding.
    • (d) Strobilanthus kunthiana flowers once in two years.

Ans (D)

27. New plants develop from leaves in 

    • (a) Eichhornia
    • (b) Bryophyllum
    • (c) Cycas
    • (d) Gladiolus

Ans (B)

28. External fertilization takes place in 

    • (a) algae
    • (b) reptiles
    • (c) birds
    • (d) mammals

Ans (A)

29. External fertilization does not takes place in 

    • (a) oyster
    • (b) sea star
    • (c) jellyfish
    • (d) mammals

Ans (D)

30. Internal fertilization takes place in 

    • (a) birds
    • (b) frog
    • (c) algae
    • (d) fish

Ans (A)

31. Reproduction by ‘budding’ occurs in 

    • (a) yeast
    • (B) paramecium
    • (C) penicillium
    • (D) all of these

Ans (A)

32.  Penicillium reproduces by : 

    • (a) budding
    • (b) fragmentation
    • (c) gemmules
    • (d) conidia

Ans (D)

Buhar board 12th Biology chapter 1 objective

33. In which of the following fertilization is internal? 

    • (a) Fishes
    • (b) Amphibians
    • (c) Majority of Algae
    • (d) Angiosperms

Ans (D)

34. Which one is incorrect? 

    • (a) Sexual reproduction involves the formation and fusion of gametes
    • (b) Pre-fertilization events include gametogenesis and gamete transfer
    • (c) Gametes are diploid in nature.
    • (d) Syngamy occurs between the male and female gametes

Ans (C)

35. Morphologically and genetically similar organisms are called

    • (a) clone
    • (b) somaclones
    • (c) cosmids
    • (d) hybrids

Ans (A)

36. In which of the following water is not essential for gamete transfer?

    • (a) Algae
    • (b) Bryophytes
    • (c) Pteridophytes
    • (d) Gymnosperms

Ans (D)

37. Which one has a diploid parental body? 

    • (a) Fungi
    • (b) Human
    • (c) Algae
    • (d) Bryophytes

Ans (B)

38. Binary fission takes place in 

    • (a) Amoeba
    • (b) Paramecium
    • (c) Bacteria
    • (d) None of the above

Ans (B)

39. Which of the following reproduces by budding? 

    • (a) Hydra
    • (b) Saccharomyces
    • (c) Amoeba
    • (d) (a) and (b)

Ans (D)

40. Aplanospores are formed in 

    • (a) Sycon
    • (b) Rhizopus
    • (c) Mucor
    • (d) (b) and (c)

Ans (D)

41. Conidia are formed in 

    • (a) Aspergillus.
    • (b) Rhizopus
    • (c) Chlamydomonas
    • (d) None of the above

Ans (A)

class 12th Biology chapter 1 objective

42. Which of the following is a modified stem and used for vegetative propagation?

    • (a) Rhizome
    • (b) Bulb
    • (c) Tuber
    • (d) All of the above

Ans (D)

43. Which statement is correct with regard to Eichhornia? 

    • (a) It is an aquatic plant.
    • (b) It is also known as the terror of Bengal.
    • (c) It reproduces by offset.
    • (d) All of the above

Ans (D)

44. Which one is monocarpic? 

    • (a) Agave
    • (b) bamboo
    • (c) (a) and (b)
    • (d) Kalanchoe

Ans (C)

45. In which of the following ‘new plants develop on leaves?

    • (a) Bryophyllum
    • (b) Kalanchoe
    • (c) (a) and (b)
    • (d) Helianthus

Ans (C)

46. Internal fertilization takes place in 

    • (a) Mammals
    • (b) Reptiles
    • (c) Birds
    • (d) All of the above

Ans (D)

47. Which of the following type of gametes occur in Chlamydomonas?

    • (a) Isogametes
    • (b) Anisogametes
    • (c) Oogametes
    • (d) All of the above

Ans (D)

48. Which of the following is a hermaphrodite?

    • (a) Tapeworm
    • (b) Sponge
    • (c) Earthworm
    • (d) All of the above

Ans (D)

49. Which of the following are formed without completion of the fertilization process?

    • (a) Bee
    • (b) Pea
    • (c) Rotifers
    • (d) (a) and (c)

Ans (D)


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Bihar board 12th science stream subjects wise solution

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SL.N.  Subject name with solutions
01 Physics
02 Chemistry
03 Biology
04 Math
05 Hindi
06 English

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