NEET BIOLOGY

Detailed explanation-1: -megagametophyte (”female” gametophyte): ma-ture embryo sac, most commonly consisting of seven cells and eight nuclei (two synergid cells, an egg cell, three antipodal cells, two polar nuclei).

Detailed explanation-2: -gametophyte of angiosperms (called the embryo sac) is tiny and contains only a few (typically eight) nuclei; the cytoplasm associated more or less directly with these nuclei is not partitioned by cell walls. One of the several nuclei of the embryo sac serves as the egg in sexual reproduction, uniting…

Detailed explanation-3: -The two haploid nuclei migrate to the opposite poles of the embryo sac and then undergo two rounds of mitosis generating four haploid nuclei at each pole. One nucleus from each set of four migrates to the center of the cell. Cellularization occurs, resulting in an eight-nucleate seven-celled structure.

Detailed explanation-4: -The haploid megaspore undergoes three rounds of mitotic divisions that result in eight haploid nuclei contained in seven cells: Two synergids, one egg cell, a central cell with two nuclei, and three antipodals.