AP BIOLOGY

Detailed explanation-1: -Pollination is the transfer of pollen from an anther of a plant to the stigma of a plant, later enabling fertilisation and the production of seeds, most often by an animal or by wind.

Detailed explanation-2: -Pollination occurs when birds, bees, bats, butterflies, moths, beetles, other animals, water, or the wind carries pollen from flower to flower or it is moved within flowers.

Detailed explanation-3: -Self-pollination is referred to as the primary type of pollination, which occurs by transferring the pollen grains directly from the anther into the stigma of the same flower.

Detailed explanation-4: -After pollen lands on the stigma, it initiates pollen tube formation. Pollen tubes are channels which grow down the length of the style to the ovules. After a pollen grain travels down a pollen tube it intercepts an ovule, fertilizes the female germ cells and initiates seed development.

Detailed explanation-5: -The transfer of pollen grains from anther to the stigma of the same flower is called self-pollination or Autogamy.