AP BIOLOGY

Detailed explanation-1: -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. Pollen grains land on the stigma and a tiny tube grows from it and down the style into the ovary.

Detailed explanation-2: -Stigma: The sticky part of the gynoecium, where the pollen grains adhere during fertilization is called stigma. Style: The stalk-like structure of gynoecium that connects the stigma to the ovary, and functions as a passage for the pollen grain to pass is called style.

Detailed explanation-3: -Sepals: These are the small, leaf-like parts growing at the base of the petals. They form the outermost whorl of the flower. Collectively, sepals are known as the calyx. The main function of the calyx and its sepals is to protect the flower before it blossoms(in the bud stage).

Detailed explanation-4: -Once the stigmatic papillae come into contact with a pollen grain, they orient themselves toward the pollen with the help of their flexibility and capillarity in the presence of the stigmatic liquid.