Describe the structure of a mature female gametophyte in angiosperms?
Question: Describe the structure of a mature female gametophyte in angiosperms?
The mature female gametophyte in angiosperms, also known as the embryo sac, is a multicellular structure that develops within the ovule of a flower. The embryo sac consists of eight haploid nuclei, derived from the meiotic division of a megaspore mother cell, and seven cells, arranged in a characteristic pattern. The most important cell of the embryo sac is the egg cell, which is located at the micropylar end of the ovule and is ready to be fertilized by a sperm nucleus from a pollen grain. The egg cell is surrounded by two synergids, which help to attract and guide the pollen tube to the embryo sac. At the opposite end of the embryo sac, there are three antipodal cells, which have no apparent function in most angiosperms. The central cell of the embryo sac contains two polar nuclei, which fuse with another sperm nucleus from the same pollen grain to form a triploid endosperm nucleus. The endosperm nucleus gives rise to the endosperm, a nutritive tissue that supports the development of the embryo.
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