NEET Biology: Sexual Reproduction in Flowering Plants — Practice Set 14 (10 MCQs)

NEET Biology: Sexual Reproduction in Flowering Plants — Practice Set 14

Q1. Which of the following statements about the significance of cross-pollination is correct?

A. Cross-pollination enhances genetic diversity and leads to more resilient plant populations.
B. Cross-pollination results in genetically identical offspring.
C. Cross-pollination is less beneficial than self-pollination for adaptability.
D. Cross-pollination always results in reduced fruit size.

A. Nectaries secrete nectar to attract pollinators, thus playing a key role in cross-pollination.
B. Nectaries produce pollen grains.
C. Nectaries are found exclusively in wind-pollinated flowers.
D. Nectaries inhibit pollinator visits by emitting repulsive chemicals.

A. Cross-pollination promotes genetic variability, enhancing adaptability and survival of plant populations.
B. Cross-pollination produces genetically identical offspring.
C. Cross-pollination reduces the chance of genetic recombination.
D. Cross-pollination limits the potential for natural selection.

A. Seed dormancy prevents germination under unfavorable environmental conditions.
B. Seed dormancy causes immediate germination once the seed is released.
C. Seed dormancy is absent in all endospermic seeds.
D. Seed dormancy only occurs in seeds that develop through apomixis.

A. Polyembryony results in a single embryo from a fertilized ovule.
B. Polyembryony is the formation of multiple embryos from a single fertilized ovule.
C. Polyembryony decreases seed viability.
D. Polyembryony is a form of asexual reproduction.

A. The funiculus connects the ovule to the ovary wall and facilitates nutrient transport.
B. The funiculus develops into the seed coat.
C. The funiculus attracts pollinators to the ovule.
D. The funiculus becomes the embryo sac after fertilization.

A. Ethylene stimulates ripening in climacteric fruits.
B. Ethylene production increases during the ripening process in climacteric fruits.
C. Ethylene delays fruit ripening.
D. Ethylene is a gaseous hormone involved in fruit softening and color change.

A. Cleistogamy involves pollination in fully open flowers.
B. Cleistogamy refers to self-pollination in closed flowers, ensuring reproduction without external pollinators.
C. Cleistogamy promotes cross-pollination between different plants.
D. Cleistogamy is typical of wind-pollinated species.

Biology — Sexual Reproduction in Flowering Plants

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Which of the following statements about the significance of cross-pollination is correct?

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