Describe different types of pollination.

Pollination can be either Natural or Artificial.

Natural Pollination
Natural Pollination is of two types —

1. Self pollination — The process of transfer of pollen grains from the anthers to the stigma of the same flower, or another flower of the same plant is called self pollination.
2. Cross pollination — The process of transfer of pollen grains from the anthers of a flower to the stigma of a flower of another plane of the same species is called cross pollination. Depending on the external agents involved, cross pollination is classified as Pollination by insects(entomophily), Pollination by wind(anemophily), pollination by water(hydrophilly) and Pollination by animals.

Artificial Pollination
Artificial pollination is performed by experts to produce new varieties of plants having desired characteristics. In this process two different varieties of a plant are selected and artificially pollinated to get a hybrid variety of that species. This is called hybridization.