In angiosperms what gives rise to seed after fertilization.

Explanation

In angiosperms, the seed develops from the ovule after fertilization. The ovule is a structure within the ovary of the flower that contains the female gametophyte (embryo sac) and the megasporangium (also called the nucellus). The megasporangium contains the megaspore mother cell, which undergoes meiosis to produce four haploid megaspores. One of these megaspores typically survives and undergoes mitotic divisions to form the female gametophyte, or embryo sac. After pollination and fertilization, the ovule develops into the seed. The fertilization event involves the fusion of one sperm cell from the pollen grain with the egg cell within the embryo sac, resulting in the formation of a diploid zygote. This zygote then develops into the embryo, while other cells in the embryo sac develop into the endosperm, which provides nourishment for the developing embryo. The ovule also undergoes changes in structure and becomes the seed coat, which surrounds and protects the embryo and endosperm. Thus, in angiosperms, the seed arises from the ovule, which contains the megasporangium and female gametophyte.