How does embryo sac develop in angiosperms? Discribe it's structure.
Answers
embryo sac
The female gametophyte (an oval structure in the nucellus of the ovule) of flowering plants, formed by the division of the haploid megaspore nucleus, and the site of fertilization of the egg and development of the embryo. Sometimes the 2 haploid, polar nuclei fuse to form a single, endosperm moter cell.
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Answer:
embryo sac The female gametophyte (an oval structure in the nucellus of the ovule) of flowering plants, formed by the division of the haploid megaspore nucleus, and the site of fertilization of the egg and development of the embryo. It consists of 6 haploid cells without cell walls (2 synergidae, 3 antipodal cells, and an egg cell) and 2 haploid nuclei (polar nuclei). Sometimes the 2 haploid, polar nuclei fuse to form a single, endosperm moter cell. At fertilization, 1 male nucleus fuses with the egg nucleus to form a zygote which develops into the embryo. The second male nucleus fuses with the primary endosperm nucleus to form the endosperm nucleus. This then divides to form the endosperm. See also DOUBLE FERTILIZATION.
