Question

please correct answer of this question.
I will give you a lot of thanks.
This is a question of 12th biology.​

Answer 1

Answer:

If the pollen is of the wrong type, the pistil rejects the pollen by preventing pollen germination on the stigma or the pollen tube growth in the style. The ability of the pistil to recognise the pollen followed by its acceptance or rejection is the result of a continuous dialogue between pollen grain and the pistil.

Answer 2

Answer:

insects like butterflies they suck nectar from flowers the pollen grains that stick to them when the flying the pollen grains falls on stigma of another flower

cross pollination

when the air blowing the pollen grains go and stick to stigma of another flower.