DENDROLOGY

Detailed explanation-1: -The female gametophyte-specifically termed a megagametophyte-is also called the embryo sac in angiosperms. The megagametophyte produces an egg cell for the purpose of fertilization. The ovule is a small structure present in the ovary. It is attached to the placenta by a stalk called a funicle.

Detailed explanation-2: -Ovary is a structure which houses the ovules.

Detailed explanation-3: -The pistil, centrally located, typically consists of a swollen base, the ovary, which contains the potential seeds, or ovules; a stalk, or style, arising from the ovary; and a pollen-receptive tip, the stigma, variously shaped and often sticky.