Stern's Introductory Plant Biology 13th Edition by James Bidlack,Shelley Jansky,Kingsley Stern

تمرين 3

It takes only one pollen grain to initiate the development of an ovule into a seed, yet a single flower may produce many thousands of pollen grains. Do you suppose such huge numbers of pollen grains are really necessary? Why do you suppose windpollinated plants produce much more pollen than insect-pollinated plants?