Pollination: Pollination is the act of transferring pollen grains from the male anther of a flower to the female stigma.
Differentiate between self-pollination and cross-pollination:

Self Pollination	Cross Pollination
Transfer of pollen grains from the anther to the stigma of the same flower.	Transfer of pollen grains from the anther to stigma of another flower.
Occurs in bisexual flowers having anther and stigma maturing at same time.	Occurs in bisexual flowers having anther and stigma maturing at different times.
External medium is not required.	External medium is required.
Transfers few numbers of pollen.	Transfers large numbers of pollen.
Examples- wheat, peas etc.	Examples- lady finger, tomato, brinjal etc.

Significance: Pollination is the act of transferring pollen grains from the male anther of a flower to the female stigma. Pollination is a very important part of the life cycle of plants. Insects, birds, bats and the wind take pollen between flowering plants, which means the plants can make seeds and reproduce.