Which one of the following characteristics promotes cross-pollination?

Mention two strategies evolved to prevent self-pollination in flowers.

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

In which plants do outbreeding devices prevent autogamy but not geitonogamy?

In bisexual flowers,when the gynoecium matures earlier than the androecium,it is called:

What is self-incompatibility?