Each pollen grain contains Two sperm which migrate down the pollen tube. Ultimately, the sperm will migrate to the embryo sac at a region called the micropyle , which is at the base of the synergids and egg. Fertilization Unlike any other living organisms, flowering plants require 2 sperm for successful reproduction. The function of the endosperm is to provide a source of nutrients and growth promoting hormones for the developing embryo within the embryo sac. Any endosperm remaining at maturity may be used for germination and seedling establishment.
Legumes are a group of angiosperms which have fleshy cotyledons.
The embryo takes on the shape of an axis with meristems at both ends. These meristems are the apical shoot meristem and the apical root meristem, from which structures of the shoot system and root system will ultimately develop. The cotyledons rapidly elongate, and the embryo is divided into regions, with respect to the cotyledons. The region below the attachment of the cotyledons is the hypocotyl which ends with the radicle , containing the apical root meristem. Typically the embryonic axis will have to fold, to fit within the embryo sac Endosperm may or may not be absorbed into the cotyledons.