AP BIOLOGY

Detailed explanation-1: -Stigma is the top swollen part of the pistil in the female reproductive part of a flower. Pollen grains from the anther of stamen part of the flower are released and land on the stigma of the flower. Stigma is sticky so that the pollen grain can attach to it.

Detailed explanation-2: -The stigma is the sticky surface at the top of the pistil; it traps and holds the pollen. The style is the tube-like structure that supports the stigma. The style leads down to the ovary which contains the ovules. During the process of pollination, pollen moves from the male parts to the female parts.

Detailed explanation-3: -The female part is the pistil. The pistil usually is located in the center of the flower and is made up of three parts: the stigma, style, and ovary. The stigma is the sticky knob at the top of the pistil.

Detailed explanation-4: -Anemophilous: Anemophilous pollination is a form of pollination where pollen grains are distributed via wind. In all wind-pollinated flowers, the mature stigma is found rough and sticky.

Detailed explanation-5: -When pollen gran falls on stigma, it germinates on stigma and produce pollen tube which enters into the ovule release 2 male gametes and fuse with the ovule to form a seed.