Question

define self pollination

Answer 1

Self-pollination is when pollen from the same plant arrives at the stigma of a flower (in flowering plants) or at the ovule (in
Gymnosperms ). There are two types of self-pollination: In
autogamy , pollen is transferred to the stigma of the same flower. In geitonogamy, pollen is transferred from the anther of one flower to the stigma of another flower on the same flowering plant, or from microsporangium to ovule within a single (monoecious) Gymnosperm. Some plants have mechanisms that ensure autogamy, such as flowers that do not open (cleistogamy), or stamens that move to come into contact with the stigma. The term selfing that is often used as a synonym, is not limited to self-pollination, but also applies to other types of self fertilization.

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Answer 2

Self pollination => it is the transfer of pollen grains from anther to stigma of the same flower or the another flower of the same plant