In Cleistogamous flowers . . . . . . .

Name the type of pollination in self-incompatible plants.

When the pollen grains are not transferred from anthers to the stigma in a flower due to a physical barrier or fence,or when some natural barrier exists between the androecium and gynoecium to check self-pollination,it is known as:

When the anthers mature earlier than the stigma of one's own flower,the condition is known as

This is a genetic mechanism that prevents self-pollination by inhibiting pollen germination or pollen tube growth in the pistil,thereby preventing fertilization.

Give scientific reasons: Outbreeding devices increase fertility.