pollen grain=male gamete?

pollen grain is not male gamete
after pollination,the pollen grain is transferred on the stigma
then,the sugary solution of stigma stimulate the pollen grain to produce enzyme
the cells of stigma is digested.
A pollen tube is developed from the pollen grain to the micropyle.
Only the male gamete will be transferred through the pollen tube,
and fertilize with the ovum in the ovary
the pollen grain remains on the stigma.
Therefore,maie gamete is only a part of pollen grain which is used to carry the male gamete.

pollen grain 唔等於 male gamete
你係會考只可以答
pollen grain contain/carry male gamete for pollnation