HORTICULTURE

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 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.

Detailed explanation-3: -Pollen is the fine, powdery substance released by anthers, a part of the flower. Pollen grains contain the male gametes of plants, which makes male sperm the closest analogous type of cell to pollen in the human body.