[1] What is the process in which the fusion of male and female gametes takes place in angiosperms?

a) Fertilization

b) Double fertilization

c) Pollination

d) Germination

[2] In double fertilization, which cell of the female gametophyte is responsible for forming the endosperm?

a) Egg cell

b) Synergid cells

c) Polar nuclei

d) Antipodal cells

[3] Which of the following is NOT a result of double fertilization?

a) Formation of the zygote

b) Formation of the endosperm

c) Formation of the embryo

d) Formation of the pericarp

[4] What is the function of the pollen tube in double fertilization?

a) To deliver the sperm cells to the ovules

b) To provide nutrients to the developing embryo

c) To protect the developing seeds

d) To form the stem of the plant

[5] In double fertilization, which cell of the male gametophyte fuses with the egg cell to form the zygote?

a) Vegetative cell

b) Sperm cell

c) Pollen grain

d) Microspore

[6] Which of the following is NOT a requirement for double fertilization to occur?

a) Presence of a pistil

b) Presence of stamens

c) Presence of a receptive stigma

d) Presence of a pollinator

[7] In double fertilization, what is the fate of the second sperm cell that does not fuse with the egg cell?

a) It degenerates

b) It forms the embryo

c) It fuses with the polar nuclei to form the endosperm

d) It forms the pericarp

[8] In which stage of the plant life cycle does double fertilization occur?

a) Germination

b) Vegetative growth

c) Reproductive growth

d) Seed maturation

[9] What is the function of the endosperm formed by double fertilization?

a) To provide nourishment to the developing embryo

b) To protect the developing seeds

c) To form the stem of the plant

d) To deliver the sperm cells to the ovules

[10] Which of the following is NOT a characteristic of angiosperms, the group of plants that undergo double fertilization?

a) Presence of seeds enclosed in a fruit

b) Presence of specialized reproductive structures such as stamens and pistils

c) Absence of vascular tissue

d) Absence of xylem and phloem

Answers:

1. b) Double fertilization
2. c) Polar nuclei
3. d) Formation of the pericarp
4. a) To deliver the sperm cells to the ovules
5. b) Sperm cell
6. d) Presence of a pollinator
7. c) It fuses with the polar nuclei to form the endosperm
8. c) Reproductive growth
9. a) To provide nourishment to the developing embryo
10. c) Absence of vascular tissue