Question

mention two methods to prevent self pollination?

Answer 1

hey buddy !! here's your answer...

the two methods by which plant prevents self pollination are -

✔️maturity of its male and female gametophytes at different time

✔️male and female flowers occur on different plants as in date palms. they are dioecious.

hope it helps !!❤️✌️

bonne journée !! ⭐⭐

Answer 2

There are many methods adopted by plants to prevent self-pollination. Such as:-
1.Herkogamy (flowers possess some mechanical barrier on their stigma surface),

2.Dichogamy (pollen and stigma mature at different times)

3.Self-incompatibility

4.Heterostyly (different lengths of stamens and styles)

5.Dioecism (unisexual and dioecious)