NEET Biology: Sexual Reproduction in Flowering Plants — Practice Set 7 (10 MCQs)

NEET Biology: Sexual Reproduction in Flowering Plants — Practice Set 7

Q1. What is the primary role of nectar in many flowering plants?

A. Two sperm cells fuse with two egg cells to form twin zygotes
B. One sperm fuses with the egg forming a zygote, while the other fuses with two polar nuclei to form the endosperm
C. Both sperm cells fuse with the egg cell simultaneously
D. Fertilization occurs without the involvement of polar nuclei

A. Self-compatibility allows a flower to fertilize itself.
B. It promotes genetic diversity by encouraging cross-pollination.
C. Self-compatibility can lead to inbreeding depression.
D. Self-compatible plants can produce offspring without the need for cross-pollination.

A. Calcium ions are essential for regulating the growth and directional guidance of the pollen tube.
B. Calcium ions inhibit the growth of the pollen tube.
C. Calcium ions are only involved in seed germination.
D. Calcium ions are not found in the pollen tube.

A. In monocots, the endosperm is typically persistent in the mature seed, whereas in dicots it is usually absorbed by the developing embryo.
B. In dicots, the endosperm is persistent, while in monocots it is absorbed by the embryo.
C. Both monocots and dicots always retain a large endosperm in the mature seed.
D. Neither monocots nor dicots develop an endosperm during seed development.

Biology — Sexual Reproduction in Flowering Plants

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What is the primary role of nectar in many flowering plants?

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