Pollination :
(i) It is the transfer of pollen grains from the anther to the stigma of a flower.
(ii) It is achieved by agents like wind,water or animals.
(iii) It leads to fertilization.
(iv) It is an external process.
Fertilization :
(i) It is the fusion of male gamete with female gamete (egg).
(ii) It is achieved by the growth of pollen tube so that the male gamete reaches the female-germ" cells. (iii) It leads to formation of seeds.
(iv) It is an internal process.