NEET Biology: Sexual Reproduction in Flowering Plants — Practice Set 13 (10 MCQs)

NEET Biology: Sexual Reproduction in Flowering Plants — Practice Set 13

Q1. Which of the following statements about crossing over during meiosis is correct?

A. Crossing over increases genetic variation among gametes by exchanging genetic material between homologous chromosomes.
B. Crossing over results in genetically identical gametes.
C. Crossing over occurs during mitosis in flowering plants.
D. Crossing over reduces the number of alleles in a population.

A. Environmental stress, such as drought or extreme temperature, can sometimes trigger flowering as a survival strategy.
B. Environmental stress always inhibits flowering and prevents reproduction.
C. Flowering induction is entirely independent of environmental factors.
D. Only nutrient-rich conditions can induce flowering in plants.

A. Bilaterally symmetrical (zygomorphic) flowers are often adapted to specific pollinators, enhancing pollination efficiency.
B. Radially symmetrical (actinomorphic) flowers always result in lower pollination efficiency.
C. Floral symmetry has no influence on pollinator attraction.
D. Bilaterally symmetrical flowers inhibit cross-pollination.

A. Pollen viability remains constant across all species.
B. Pollen viability varies among species, with some pollen remaining viable for several days under favorable conditions.
C. Pollen viability is not affected by environmental factors.
D. Pollen viability is always below 24 hours.

A. The endosperm provides nutrition to the developing embryo.
B. The endosperm is typically triploid, formed by the fusion of one sperm with two polar nuclei.
C. The endosperm always persists in the mature seed of all flowering plants.
D. Double fertilization leads to the formation of the endosperm.

A. The Polygonum type is the most common, while the Allium type is less frequent.
B. The Allium type is the only embryo sac type found in monocots.
C. The Allium type always contains 12 nuclei.
D. There is no variation in embryo sac development among angiosperms.

Biology — Sexual Reproduction in Flowering Plants

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Which of the following statements about crossing over during meiosis is correct?

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