Question

What happen when pollen grain fall on stigma?
a) fertilization.
b) pollination.​

Answer 1

Explanation:

Only after pollination, when pollen has landed on the stigma of a suitable flower of the same species, can a chain of events happen that ends in the making of seeds. A pollen grain on the stigma grows a tiny tube, all the way down the style to the ovary. ... The ovary develops into a fruit to protect the seed.

Answer 2

Answer:

pollination is the step here