A dioecious flowering plant prevents both :

Question

1. Autogamy and geitonogamy 2. Geitonogamy and xenogamy 3. Cleistogamy and xenogamy 4. Autogamy and xenogamy

Doubtly AI · Accepted Answer

Answer: 1. Autogamy and geitonogamy A dioecious plant bears male and female flowers on separate plants. Autogamy (pollen to stigma of the same flower) is impossible because a flower has only one sex. Geitonogamy (pollen from another flower of the same plant) is impossible because the same plant has only one sex of flower. Xenogamy (cross pollination between different plants) is the only possible type. So both autogamy and geitonogamy are prevented.

A dioecious flowering plant prevents both :

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