This 50-Hiquestion MCQ set comprehensively covers the topic of Sexual Reproduction in Flowering Plants for Class 12 students. It helps in revising key concepts such as pollination, fertilization, seed development, fruit formation, and reproductive structures. Practicing these MCQs will strengthen understanding and boost confidence for exams.
Here is a complete set of 50 MCQs on Sexual Reproduction in Flowering Plants for Class 12 along with the answers at the
1. Which part of the flower develops into fruit after fertilization?
a) Ovary
b) Ovule
c) Stigma
d) Anther
2. What is the female reproductive part of a flower called?
a) Androecium
b) Gynoecium
c) Corolla
d) Calyx
3. The process of transfer of pollen grains from anther to stigma is called:
a) Fertilization
b) Pollination
c) Germination
d) Propagation
4. Which of the following is NOT a type of pollination?
a) Autogamy
b) Geitonogamy
c) Xenogamy
d) Symbiosis
5. Insects help in which type of pollination?
a) Hydrophily
b) Anemophily
c) Entomophily
d) Zoophily
6. What is the function of the pollen tube?
a) Protect the ovule
b) Help in fertilization
c) Absorb nutrients
d) Store food
7. The endosperm in angiosperms is:
a) Diploid
b) Haploid
c) Triploid
d) Tetraploid
8. What is double fertilization?
a) Two male gametes fertilizing two egg cells
b) One male gamete fertilizing an egg and the other fusing with polar nuclei
c) Fusion of two pollen grains
d) Self-fertilization in a single flower
9. What is the primary function of petals in a flower?
a) Attract pollinators
b) Protect the ovule
c) Aid in water absorption
d) Carry out photosynthesis
10. Which type of pollination occurs between flowers of different plants of the same species?
a) Autogamy
b) Geitonogamy
c) Xenogamy
d) Cleistogamy
11. The outermost whorl of a flower is called:
a) Corolla
b) Androecium
c) Calyx
d) Gynoecium
12. In which of the following does wind pollination take place?
a) Sunflower
b) Maize
c) Rose
d) Jasmine
13. Which structure in the ovule develops into the seed?
a) Ovary
b) Embryo sac
c) Nucellus
d) Zygote
14. The fusion of male and female gametes is known as:
a) Pollination
b) Germination
c) Fertilization
d) Ovulation
15. What is the ploidy of the embryo in angiosperms?
a) Haploid
b) Diploid
c) Triploid
d) Tetraploid
16. The seed coat develops from:
a) Ovary wall
b) Ovule wall
c) Nucellus
d) Egg cell
17. The process in which a single parent produces offspring without fertilization is called:
a) Asexual reproduction
b) Pollination
c) Sexual reproduction
d) Double fertilization
18. Which part of the seed contains stored food for the developing embryo?
a) Plumule
b) Radicle
c) Cotyledons
d) Endosperm
19. What is the function of synergids in the embryo sac?
a) Help in fertilization
b) Develop into the seed coat
c) Store food
d) Carry out photosynthesis
20. Which of the following is an agent of pollination?
a) Wind
b) Water
c) Insects
d) All of the above
21. How many cells are present in a mature pollen grain?
a) One
b) Two
c) Three
d) Four
22. What is the function of the tapetum in the anther?
a) Protect pollen grains
b) Provide nutrition to developing pollen grains
c) Aid in pollination
d) Store food
23. The male gametes in angiosperms are formed in:
a) Ovule
b) Anther
c) Ovary
d) Stigma
24. The female gametophyte in angiosperms is known as:
a) Ovule
b) Embryo sac
c) Endosperm
d) Synergid
25. The point of attachment between the seed and the fruit is called:
a) Funicle
b) Hilum
c) Micropyle
d) Cotyledon
-
Which part of the ovule forms the micropyle?
a) Nucellus
b) Integuments
c) Embryo sac
d) Endosperm -
Which type of pollination occurs within the same flower?
a) Autogamy
b) Geitonogamy
c) Xenogamy
d) Cross-pollination -
What is the role of the style in the gynoecium?
a) Produces pollen
b) Protects the ovule
c) Connects stigma to ovary
d) Helps in pollination -
What is the first step of seed germination?
a) Root emergence
b) Absorption of water
c) Shoot growth
d) Photosynthesis -
The ovule develops into:
a) Fruit
b) Seed
c) Ovary
d) Cotyledon -
What is the primary function of the cotyledons in dicot seeds?
a) Absorption of water
b) Storage of food
c) Pollination
d) Seed dispersal -
In which part of the flower does fertilization occur?
a) Ovary
b) Anther
c) Petals
d) Sepals -
Which of the following is an example of anemophily (wind pollination)?
a) Sunflower
b) Maize
c) Rose
d) Jasmine -
The part of the seedling that emerges first during germination is:
a) Plumule
b) Radicle
c) Cotyledon
d) Hypocotyl -
What is the term for a flower that has both male and female reproductive organs?
a) Dioecious
b) Monoecious
c) Bisexual
d) Unisexual -
What is the role of pollen grain in fertilization?
a) Produces egg cells
b) Develops into fruit
c) Forms the pollen tube and delivers male gametes
d) Protects the seed -
How many nuclei are present in a mature embryo sac?
a) 4
b) 6
c) 7
d) 8 -
The generative cell in a pollen grain divides to form:
a) Two male gametes
b) Two synergids
c) Two egg cells
d) Three pollen tubes -
What is the function of antipodal cells in the embryo sac?
a) Nutrition to embryo sac
b) Develop into the seed coat
c) Participate in fertilization
d) Assist in double fertilization -
Which of the following is a parthenocarpic fruit?
a) Mango
b) Apple
c) Banana
d) Tomato -
What does the term "exine" refer to in pollen grains?
a) Inner layer of the pollen grain
b) Outer hard layer of the pollen grain
c) Tube nucleus
d) Male gamete -
Which structure in the embryo sac fuses with a male gamete to form the embryo?
a) Egg cell
b) Synergids
c) Antipodals
d) Polar nuclei -
The process of artificial hybridization involves:
a) Cutting the flower
b) Removing anthers from a bisexual flower
c) Allowing only self-pollination
d) Preventing pollination -
What is the significance of endosperm in seed development?
a) Forms the seed coat
b) Nourishes the developing embryo
c) Aids in pollination
d) Helps in fertilization -
A pollen grain with three furrows is called:
a) Monocolpate
b) Bicolpate
c) Tricolpate
d) Tetracolpate -
In which plant does hydrophily (water pollination) occur?
a) Wheat
b) Water lily
c) Vallisneria
d) Mango -
The process of embryo formation without fertilization is called:
a) Parthenogenesis
b) Parthenocarpy
c) Pollination
d) Hybridization -
Which of the following plants has a unisexual flower?
a) Rose
b) Papaya
c) Sunflower
d) Hibiscus -
The function of the hilum in a seed is to:
a) Absorb water
b) Store food
c) Attach seed to the fruit
d) Protect the seed coat -
What is the fate of the ovary after fertilization?
a) Becomes the seed
b) Forms the fruit
c) Forms pollen grains
d) Becomes a petal
Answers:
1. a) Ovary
2. b) Gynoecium
3. b) Pollination
4. d) Symbiosis
5. c) Entomophily
6. b) Help in fertilization
7. c) Triploid
8. b) One male gamete fertilizing an egg and the other fusing with polar nuclei
9. a) Attract pollinators
10. c) Xenogamy
11. c) Calyx
12. b) Maize
13. d) Zygote
14. c) Fertilization
15. b) Diploid
16. b) Ovule wall
17. a) Asexual reproduction
18. d) Endosperm
19. a) Help in fertilization
20. d) All of the above
21. b) Two
22. b) Provide nutrition to developing pollen grains
23. b) Anther
24. b) Embryo sac
25. b) Hilum
- b) Integuments
- a) Autogamy
- c) Connects stigma to ovary
- b) Absorption of water
- b) Seed
- b) Storage of food
- a) Ovary
- b) Maize
- b) Radicle
- c) Bisexual
- c) Forms the pollen tube and delivers male gametes
- d) 8
- a) Two male gametes
- a) Nutrition to embryo sac
- c) Banana
- b) Outer hard layer of the pollen grain
- a) Egg cell
- b) Removing anthers from a bisexual flower
- b) Nourishes the developing embryo
- c) Tricolpate
- c) Vallisneria
- a) Parthenogenesis
- b) Papaya
- c) Attach seed to the fruit
- b) Forms the fruit
0 Comments