The chapter “Sexual Reproduction in Flowering Plants” is one of the most important topics in Class 12th Biology under the Bihar Board syllabus. This chapter explains how flowering plants reproduce sexually, including the structure of flowers, pollination, fertilization, and the formation of fruits and seeds. To help students prepare effectively for exams, here are 50 objective questions with options and one-word answers covering all key concepts from this chapter.
Bihar Board Class 12 Biology Sexual Reproduction in Flowering Plants Objective Questions with Answers [50+ FAQs]
1. What is the reproductive part of a flowering plant?
a) Leaf
b) Root
c) Flower
d) Stem
Answer: Flower
2. Which part of the flower produces pollen grains?
a) Ovary
b) Anther
c) Style
d) Stigma
Answer: Anther
3. The male reproductive organ of a flower is called:
a) Gynoecium
b) Androecium
c) Ovary
d) Carpel
Answer: Androecium
4. The female reproductive organ of a flower is called:
a) Stamen
b) Carpel
c) Petal
d) Sepal
Answer: Carpel
5. The process of transfer of pollen grains is known as:
a) Fertilization
b) Germination
c) Pollination
d) Reproduction
Answer: Pollination
6. Pollination that occurs within the same flower is called:
a) Geitonogamy
b) Xenogamy
c) Autogamy
d) Cross-pollination
Answer: Autogamy
7. Pollination between two flowers of the same plant is called:
a) Autogamy
b) Geitonogamy
c) Xenogamy
d) Allogamy
Answer: Geitonogamy
8. Pollination between flowers of different plants is known as:
a) Autogamy
b) Geitonogamy
c) Xenogamy
d) Self-pollination
Answer: Xenogamy
9. The outermost whorl of the flower is:
a) Corolla
b) Calyx
c) Androecium
d) Gynoecium
Answer: Calyx
10. The second whorl of a flower consists of:
a) Sepals
b) Petals
c) Stamens
d) Carpels
Answer: Petals
11. The structure that receives pollen during pollination is:
a) Ovary
b) Stigma
c) Style
d) Ovule
Answer: Stigma
12. The ovule develops into:
a) Fruit
b) Seed
c) Flower
d) Embryo sac
Answer: Seed
13. The ovary develops into:
a) Seed
b) Fruit
c) Embryo
d) Zygote
Answer: Fruit
14. The male gamete fuses with the female gamete to form:
a) Embryo
b) Zygote
c) Seed
d) Ovule
Answer: Zygote
15. Double fertilization is a unique feature of:
a) Algae
b) Gymnosperms
c) Angiosperms
d) Fungi
Answer: Angiosperms
16. The fusion of male gamete with egg cell is called:
a) Syngamy
b) Triple fusion
c) Fertilization
d) Pollination
Answer: Syngamy
17. The fusion of second male gamete with two polar nuclei is known as:
a) Triple fusion
b) Double fertilization
c) Pollination
d) Germination
Answer: Triple fusion
18. The product of triple fusion is:
a) Embryo
b) Endosperm
c) Zygote
d) Ovule
Answer: Endosperm
19. Which part of the seed contains the future plant?
a) Endosperm
b) Cotyledon
c) Embryo
d) Seed coat
Answer: Embryo
20. The outer covering of a seed is called:
a) Testa
b) Pericarp
c) Endosperm
d) Embryo
Answer: Testa
21. Which type of pollination requires agents like wind or insects?
a) Self-pollination
b) Cross-pollination
c) Autogamy
d) Geitonogamy
Answer: Cross-pollination
22. Pollination by insects is called:
a) Anemophily
b) Entomophily
c) Hydrophily
d) Ornithophily
Answer: Entomophily
23. Pollination by wind is called:
a) Hydrophily
b) Anemophily
c) Zoophily
d) Ornithophily
Answer: Anemophily
24. Pollination by water is known as:
a) Hydrophily
b) Entomophily
c) Zoophily
d) Ornithophily
Answer: Hydrophily
25. Pollination by birds is known as:
a) Hydrophily
b) Entomophily
c) Ornithophily
d) Zoophily
Answer: Ornithophily
26. Pollen grains are produced in:
a) Ovary
b) Anther
c) Stigma
d) Style
Answer: Anther
27. The process of formation of male gamete is called:
a) Microsporogenesis
b) Megasporogenesis
c) Gametogenesis
d) Fertilization
Answer: Microsporogenesis
28. The process of formation of female gamete is called:
a) Microsporogenesis
b) Megasporogenesis
c) Pollination
d) Fertilization
Answer: Megasporogenesis
29. The pollen tube helps in:
a) Pollination
b) Transport of male gametes
c) Seed formation
d) Fruit development
Answer: Transport of male gametes
30. The main nutritive tissue in a seed is:
a) Cotyledon
b) Endosperm
c) Embryo
d) Seed coat
Answer: Endosperm
31. In angiosperms, double fertilization produces:
a) Two zygotes
b) One zygote and one endosperm
c) Two endosperms
d) Two embryos
Answer: One zygote and one endosperm
32. Embryo sac is also known as:
a) Female gametophyte
b) Male gametophyte
c) Ovule
d) Zygote
Answer: Female gametophyte
33. How many nuclei are present in a mature embryo sac?
a) 6
b) 7
c) 8
d) 9
Answer: 8
34. The entry of pollen tube into the ovule through micropyle is called:
a) Porogamy
b) Chalazogamy
c) Mesogamy
d) Syngamy
Answer: Porogamy
35. Which structure encloses the ovule?
a) Ovary
b) Anther
c) Stigma
d) Sepal
Answer: Ovary
36. The fusion of male and female gametes is called:
a) Fertilization
b) Pollination
c) Germination
d) Seed formation
Answer: Fertilization
37. The process that results in the formation of fruits and seeds is:
a) Fertilization
b) Pollination
c) Germination
d) Photosynthesis
Answer: Fertilization
38. The edible part of an apple is:
a) Seed
b) Pericarp
c) Thalamus
d) Ovary
Answer: Thalamus
39. Coconut is a:
a) Berry
b) Drupe
c) Capsule
d) Nut
Answer: Drupe
40. Which of the following is a unisexual flower?
a) Hibiscus
b) Maize
c) Mustard
d) Rose
Answer: Maize
41. Bisexual flowers contain:
a) Only stamens
b) Only carpels
c) Both stamens and carpels
d) None
Answer: Both stamens and carpels
42. Which plant shows self-pollination?
a) Wheat
b) Maize
c) Papaya
d) Date palm
Answer: Wheat
43. Which plant shows cross-pollination?
a) Pea
b) Wheat
c) Maize
d) Tomato
Answer: Maize
44. The part of a flower that attracts insects is:
a) Sepal
b) Petal
c) Stamen
d) Ovary
Answer: Petal
45. The male gametophyte in angiosperms is:
a) Microspore
b) Pollen grain
c) Megaspore
d) Embryo sac
Answer: Pollen grain
46. The first cell of the new generation is:
a) Zygote
b) Embryo
c) Seed
d) Ovule
Answer: Zygote
47. Which structure provides nutrition to the developing embryo?
a) Cotyledon
b) Endosperm
c) Seed coat
d) Fruit wall
Answer: Endosperm
48. Formation of seed without fertilization is known as:
a) Parthenogenesis
b) Apomixis
c) Pollination
d) Grafting
Answer: Apomixis
49. The outermost covering of the fruit is called:
a) Testa
b) Pericarp
c) Seed coat
d) Epicarp
Answer: Pericarp
50. Which part of the flower turns into fruit after fertilization?
a) Ovule
b) Ovary
c) Stigma
d) Style
Answer: Ovary
Conclusion
These 50 objective questions and 10 FAQs from Chapter – Sexual Reproduction in Flowering Plants cover all essential concepts for Bihar Board Class 12 Biology exams. Practice them regularly to strengthen your understanding and secure top marks in the board exams.
FAQs – Sexual Reproduction in Flowering Plants
1. What is sexual reproduction in flowering plants?
Answer: It is the process by which male and female gametes fuse to form a zygote, leading to seed and fruit formation.
2. What is double fertilization?
Answer: Double fertilization involves two fusions — one male gamete fuses with the egg to form a zygote, and the other fuses with two polar nuclei to form endosperm.
3. What are the main agents of pollination?
Answer: Wind, water, insects, and birds are the main pollinating agents.
4. What is the function of pollen tube?
Answer: The pollen tube transports male gametes to the ovule for fertilization.
5. What is the difference between self and cross-pollination?
Answer: Self-pollination occurs within the same flower or plant, while cross-pollination occurs between flowers of different plants.
6. What is apomixis?
Answer: Apomixis is the formation of seeds without fertilization.
7. What is the function of endosperm?
Answer: Endosperm provides nourishment to the developing embryo.
8. Which structure of the flower becomes the fruit?
Answer: The ovary develops into a fruit after fertilization.
9. Which structure becomes the seed?
Answer: The ovule develops into a seed.
10. Why is sexual reproduction important in plants?
Answer: It promotes genetic variation and helps in the evolution of plant species.