Question

What happens when pollen grains fall on the stigma --fertilization or pollination?​

Answer 1

Answer:

Explanation:

When a pollen grain lands on the stigma of a flower of the correct species , a pollen tube begins to grow. It grows through the style until it reaches an ovule inside the ovary. The nucleus of the pollen then passes along the pollen tube and fuses (joins) with the nucleus of the ovule.

Answer 2

Answer:

when it is transferred from another to stigma it is pollination.

when the pollen grain unites with ova it's called fertilization. thus the answer is pollination.