AP BIOLOGY

Detailed explanation-1: -The female gametophyte (FG), called the embryo sac, produces the female gametes and usually is obscured within the maternal, sporophytic ovule ( Figure 1). Fusion of male and female gametes occurs during double fertilization, after the sperm cells are delivered to the embryo sac by the pollen tube.

Detailed explanation-2: -The female gametophyte in angiosperms plants is called Embryo Sac or Megagametophyte. In angiosperms, it is required for sexual and asexual seed development. It consists of 3 antipodal cells, one central cell, one egg cell and two synergid cells.

Detailed explanation-3: -The ovule in plants is a structure that encloses the reproductive cells in females which contains the nucleus, the integument and the female gametophyte. “The embryo sac or female gametophyte is an oval structure present in the ovule of flowering plants.

Detailed explanation-4: -In flowering plants, the pollen grain is the male gametophyte and the embryo sac is the female gametoph yte. The male gametophyte completes its early development within the anther.

Detailed explanation-5: -Embryo sac is also known as the female gametophyte or megagametophyte.