Question

Difference between autogamy and allogamy?

Difference between wind pollinated flower and insect pollinated flower ?

What happens after fertilization in hilum part and antipodal cell and secondary nucleus ?

Answer 1

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Autogamy is defined as the type of self-pollination in which pollen grain fall on the stigma of same flower.
Allogamy is also known as cross-pollination. In allogamy pollen grain from another flower falls on stigma of a flower growing on another plant of same species.