Stern's Introductory Plant Biology 12th Edition by James Bidlack,Shelley Jansky

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 wind-pollinated plants produce much more pollen than insect-pollinated plants?