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Which one of the following may require pollinators, but is genetically similar to autogamy?

1. Xenogamy
2. Apogamy
3. Cleistogamy
4. Geitonogamy

Correct answer: Geitonogamy

Solution

Geitonogamy is transfer of pollen from one flower to another flower on the same plant, so it may need a pollinator but is genetically similar to autogamy because the pollen donor and recipient are the same plant. This makes it different from xenogamy, which is between different plants.

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