Geitonogamy involves
- Afertilization of a flower by the pollen from another flower of the same plant
- Bfertilization of a flower by the pollen from the same flower
- Cfertilization of a flower by the pollen from a flower of another plant in the same population
- Dfertilization of a flower by the pollen from a flower of another plant belonging to a distant population.
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