Pollination is the transfer of pollen grains (i.e. plant sperm) from the anther (male) part of a flower to the stigma (female) part of a flower. Some plants such as avocados and maize must be cross-pollinated (i.e. pollen grains moving from one plant to the other). Others like pepper can be self-pollinated (i.e. pollen grains fertilizing flowers from the same plant).
