AP BIOLOGY

Detailed explanation-1: -Pollen is a powdery substance produced by seed plants. It consists of pollen grains (highly reduced microgametophytes), which produce male gametes (sperm cells).

Detailed explanation-2: -Pollen is essential for sexual reproduction of flowering plants and plants that produce cones. Each pollen grain contains male gametes necessary for fertilisation. The scientific study of living and fossilised pollen grains is known as palynology. The male part of flowering plants is the stamen.

Detailed explanation-3: -Pollen grains are the male sex cell of a plant. They are present in the anther of a flower.

Detailed explanation-4: -Pollen grains: Pollen grains carry male reproductive cells (gametes) in a plant and are haploid microgametophytes. Role of pollen grains: In plants, pollen is used to transfer haploid male genetic content from anthers of a flower to the stigma of others in the process of cross-pollination.