First slide
Pre-fertilisation : Structures and Events
Question

Autogamy and Geitonogamy do not occur in 

Easy
Solution

Papaya is dioecious plant and hence does not show autogamy and geitonogamy but shows only xenogamy. Maize and Castor are monoecious plants which do not show autogamy but show both geitonogamy and xenogamy. Commelina has bisexual cleistogamous and chasmogamous flowers and show autogamy, geitonogamy and xenogamy.

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