What is the biological significance of cross and self-pollination in plants?

The essence of cross-pollination is that the pollen of one plant pollinates the flower of another plant. This pollination can be due to insects or wind. With such pollination, changes in the qualities of the fruit of plants often occur and certain mutations occur, since genetic information is mixed. During self-pollination, pollen is released on the same flower as the pistil. This is an easier method of pollination, but it does not cross the genetic material, so the same plants will germinate from the seeds.