AP BIOLOGY

Detailed explanation-1: -NARRATOR: In flowering plants, pollination occurs when pollen grains are transferred from the stamens to the ovules . From the anther the pollen grains are first deposited on the pistil’s surface, the stigma . There they germinate and form pollen tubes, which grow downward through the style toward the ovules.

Detailed explanation-2: -Pollination is the transfer of pollen from an anther to a stigma, either by wind or by pollinators.

Detailed explanation-3: -Pollen is transferred from one flower to another through different vectors, including wind, water, birds, insects, butterflies, bats, and other animals. Animals and insects capable of carrying and dispersing pollen grains are collectively called pollinators.

Detailed explanation-4: -Cross pollination is the transfer of pollen grains from the anther of one flower to the stigma of another flower of different plant.

Detailed explanation-5: -Pollen is produced by the male part of the plant called the stamen of which the anther is a part. In the pollination process, the male pollen will land on the female part of the flower, the pistil of which the stigma is a part.