It then grows toward a clear bit of protoplasm known as the embryo sac.
It is a small, pear-shaped mass of cells, the smaller end directed toward the upper end of the embryo sac.
The integuments grow with the embryo sac, and become brown and hard, forming the shell of the seed.
Find there the little hole through which the pollen tube reached the embryo sac.
embryo sac |
An oval structure within an ovule of an angiosperm that contains the egg. Together with the fertilized egg, it develops into a seed. The embryo sac is the female gametophyte of angiosperms, consisting of eight nuclei: the egg and two adjacent and short-lived synergids that are near the micropyle (the opening where the pollen nuclei will enter), two central nuclei (which will combine with one of the pollen nuclei to form the endosperm), and three antipodal nuclei at the end of the embryo sac opposite the micropyle. Like the synergids, these nuclei degenerate at or shortly after fertilization. See more at gametophyte, pollination.