NEET BIOLOGY

Detailed explanation-1: -They are both nutritive layers in a seed. Perisperm develops from the nucellus of the seed and the endosperm develops when the sperm cell fuses with two haploid polar nuclei (contained in the central cell) in the centre of the embryo sac (or ovule).

Detailed explanation-2: -The differentiating factor between both tissues is that perisperm is diploid, emerging from the nucleus, while the endosperm is triploid, emerging from triple fusion.

Detailed explanation-3: -Perisperm is the remnant of nucellus which are persistent. It encloses the embryo and provides nourishment to it in certain seeds. Endosperm is the tissue formed after double fertilisation. It surrounds, stores food and provide nourishment to the embryo in an angiosperm seed.

Detailed explanation-4: -One sperm nucleus fertilizes the egg cell, forming a zygote, while the other sperm nucleus usually fuses with the binucleate central cell, forming a primary endosperm cell (its nucleus is often called the triple fusion nucleus). That cell created in the process of double fertilization develops into the endosperm.

Detailed explanation-5: -Hint: Perisperm is the nutrient tissue that covers the embryo in some seeds and grows from the nucleus of the ovule. The endosperm is a tissue formed within the seeds of most flowering plants after double fertilisation.