(i) What is the difference between self-pollination and cross pollination?
(ii) What happens to the pollen which falls on a suitable stigma? Explain.

Explanation

(i) Self-pollination is the transfer of pollen grains from the anther of one flower to the stigma of the same flower or another flower of the same plant.
Cross pollination is the transfer of pollen-grain from the anther of one flower to the stigma of another flower growing on another plant of the same species.
(ii) The pollen grain starts germinating and forms a pollen tube. The pollen tube grows in the style till reaches the ovule through micropyle where it fertilizes with female gamete.