The transfer of pollen grain from the stamen to the stigma of the same flower is

Which of the following plant provides safe place to insect for laying eggs?

Ornithophily refers to the pollination by which of the following?

In which plants out breeding device prevent autogamy but not geitonogamy?

Wind pollinated flower have long well exposed stigma. This statement is

Which one of the following is not a correct explanation of cross-pollination?