What happens when a pollen grain falls on a stigma?

Pollen grain is

What happens to the pollen grain after pollination? What is fertilization?

What happens when an electron gains energy ?

pollen grains of stigma help in ?

What are pollen grains ?

What happens when parallel rays of light fall on a lens making some angle with the principal axis ?

What happens when anisole is nitrated ?

What happens when you burn camphor?

What happens when a seed is sown in soil?

What helps to bring pollen grains to the stigma ?