Prepare for NEET Biology Sexual Reproduction in Flowering Plants with MCQs & PYQs on NEET.GUIDE. Enjoy free practice, previous year questions, and expert solutions for pollination and fertilization.
NEET Questions / Botany / Sexual Reproduction in Flowering Plants
A researcher observes a plant species where the generative cell undergoes mitosis before pollination, resulting in two sperm cells within the pollen grain. How might this unusual characteristic affect double fertilization?
Prevent double fertilization from occurring.
Enhance the efficiency of double fertilization.
Potentially lead to the fertilization of both the egg cell and a synergid, disrupting endosperm development.
Have no significant impact on the process of double fertilization.
A unique feature of angiosperm embryogenesis is the formation of a suspensor. Which statement regarding the suspensor is INCORRECT?
It connects the developing embryo to the maternal tissues.
It provides a conduit for nutrients and growth regulators.
It pushes the embryo into the endosperm.
It undergoes extensive cell divisions to form the embryo proper.
Which of the following accurately describes the difference between the development of the nuclear endosperm and the cellular endosperm?
Nuclear endosperm is formed after fertilization, while cellular endosperm is formed before fertilization.
Nuclear endosperm is triploid, while cellular endosperm is diploid.
Nuclear endosperm is found in monocots, while cellular endosperm is found in dicots.
Nuclear endosperm involves free-nuclear divisions before cell wall formation, while cellular endosperm involves cell wall formation after each division.
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?
Early embryogenesis
Histodifferentiation
Maturation
Germination
In a species exhibiting pseudogamy, the pollen is essential for:
Embryo development
Endosperm development
Seed coat formation
Fruit development
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?
Endosperm would not develop, impacting seed viability.
The zygote would fail to form, preventing embryo development.
A triploid zygote would form instead of a diploid zygote.
The ovule would develop into a seedless fruit.
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?
2n, n
3n, 2n
5n, 2n
n, 2n
Which of the following statements BEST explains why double fertilization is advantageous for angiosperms?
It ensures the formation of a triploid endosperm, which is more resistant to pathogens.
It allows for the production of both seeds and fruits, enhancing dispersal.
It synchronizes endosperm development with embryo development, preventing wasted resources if fertilization fails.
It eliminates the need for separate male and female gametophytes.
Certain apomictic plants produce seeds without fertilization. How would the genetic makeup of the endosperm in such a plant likely differ from a sexually reproducing angiosperm?
It would be genetically identical to the maternal tissue.
It would be a mixture of maternal and paternal genes.
It would be entirely paternal in origin.
It would be haploid.
