Question

3. What happens when a pollen grain falls on
stigma?
a​

Answer 1

• When pollen grain falls on stigma, it germinates on stigma and produce pollen tube

$\boxed {\mathrm { \: \sf \: Explaination -\: }}$

Pollen grain will falls on stigma .

To produce pollen tube . which enters into the ovule release 2 male gametes and fuse with the ovule to form a seed.