AP BIOLOGY

Detailed explanation-1: -Pistil: The ovule producing part of a flower.

Detailed explanation-2: -Ovules – These are the flower’s eggs, located inside the ovary. Upon fertilization by pollen, they will eventually grow into a seed. In fruit plants, pollen will not only spark the growth of a seed, but a surrounding fruit as well.

Detailed explanation-3: -It consists of three parts: the integument, forming its outer layer, the nucellus (or remnant of the megasporangium), and the female gametophyte (formed from a haploid megaspore) in its center. The female gametophyte-specifically termed a megagametophyte-is also called the embryo sac in angiosperms.

Detailed explanation-4: -The ovule is the organ that forms the seeds of flowering plants. It is borne in the ovary of the flower and consists of nucellus protected by integuments, precursors of embryo/endosperm, and seed coat, respectively.