What is the function of pollen grains?
Pollen is a sticky powder that is produced by the male parts of flowering plants. It is an important part in the process of plant pollination and reproduction.StructureFlowering plants have male and female parts. The male parts are called stamen; they are usually stem-like structures that hold pollen.Pollination ProcessPollination occurs in a plant when grains of pollen move from the plant stamen to the female part of the plant, the pistil. This part of the plant usually has a sticky end on it called a stigma, designed to catch pollen grains. Pollination allows a plant to produce seeds and reproduce.Pollination TypesPlants can either self-pollinate or cross-pollinate. In the former, pollen from one plant moves from its stamen to its own stigma and pistil; cross-pollination happens when the pollen from one plant fertilizes another plant. Plants can only be pollinated by the same species: Pollen from a cherry tree won’t affect a rose bush.Pollen MovementPollen is usually moved either wit
