AP BIOLOGY

Detailed explanation-1: -The bee collects the pollen by rubbing against the anthers. The pollen collects on the hind legs, in a structure referred to as a “pollen basket". As the bee flies from flower to flower, some of the pollen grains are transferred onto the stigma of other flowers.

Detailed explanation-2: -The act of transferring pollen from the anther to the stigma. The pollen may be carried by the wind or water, but is usually transported by a go-between insect, bird or bat.

Detailed explanation-3: -The transfer of pollen grains from the anther to stigma of a flower is called pollination.

Detailed explanation-4: -Due to the spatial separation between male and female pollen grains from the anther of most flowering plants, including orchids, pollens are transported by wind or animals and deposited onto the receptive surface of the stigma of a different plant.

Detailed explanation-5: -The anther produces pollen (male reproductive cells). The filament holds the anther up. During the process of fertilization, pollen lands on the stigma, a tube grows down the style and enters the ovary. Male reproductive cells travel down the tube and join with the ovule, fertilizing it.