Draw a neatly labelled diagram to explain plant fertilisation. Write a few points on pollen grain.

Explanation

Pollen grains:
(1) Pollen grains develop in anther.
(2) The spore forming tissue give rise to pollen mother cells in the anther.
(3) Each pollen mother cells undergoes meiosis to form four daughter cells which develope into pollen grains
(4) Pollen grains are haploid (n).
(5) They contain only one set of chromosome (n)
(6) The study of pollen grain is called palynology.
(7) During pollination pollen grains are dispersed by wind and insects.
(8) Pollen grains are formed in large numbers. They are light in weight and are easily curried by wind currents.