First slide

Pre-fertilisation : Structures and Events

Question

Dioecy is the mechanism for some plants to promote

Easy

A

autogamy
B

self-fertilization
C

cross pollination
D

geitonogamy

Solution

In several species such as papaya, male and female flowers are present on different plants, that is each plant is either male or female (dioecy). This condition prevents both autogamy and geitonogamy. Dioecy promotes cross-pollination or xenogamy.

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