NEET Botany Sexual Reproduction in Flowering Plants MCQs

In a particular angiosperm species, the synergids exhibit a unique filiform apparatus oriented away from the micropyle. What would be the MOST likely consequence of this unusual arrangement?

A mutation affects the tapetum in a developing anther, leading to premature degeneration of this tissue. What is the MOST likely direct consequence of this mutation?

Which of the following combinations of floral characteristics would MOST effectively promote cross-pollination?

In a rare genetic mutation in a dicot plant, the formation of the hypophysis is inhibited. What would be the MOST likely direct consequence of this mutation?

A researcher observes a developing seed and notices that the cells of the endosperm are undergoing programmed cell death. This process is MOST likely associated with which stage of seed development?

A citrus plant known to exhibit both nucellar and integumentary embryony is crossed with a plant that only undergoes zygotic embryony. Assuming both types of apomixis are equally likely in the first plant and all embryos are viable, what is the expected ratio of zygotic to apomictic embryos in the progeny?

In a species exhibiting pseudogamy, the pollen is essential for:

A unique feature of angiosperm fertilization is the formation of both a zygote and an endosperm nucleus. If a mutation occurred preventing the fusion of one of the male gametes with the polar nuclei, what would be the MOST likely direct consequence?

In a hypothetical plant species, the polar nuclei contain 2n chromosomes each, and the male gametes are n. What would be the ploidy of the endosperm and zygote, respectively, after double fertilization?

A researcher discovers a new angiosperm species where the central cell contains four polar nuclei instead of the usual two. Assuming normal fertilization occurs, what would be the ploidy of the resulting endosperm?