Pollination

Fertilization

1. Definition. It is transfer of pollen grains from anther to the stigma of a flower.

It is the fusion of male and female gametes.

2. Step. Pollination precedes fertilization.

Fertilization occurs only after pollination when the pollen grain has germinated and male gametes are carried into ovule.

3. Purpose. It carries the male gamete producing pollen grains to the female sex organ

It actually brings about fusion of gametes

4. Process. Pollination is a physical process

Fertilization is a physico-chemical (biological) process.

5. Occurrence. It occurs only in seed plants

It occurs in both plants and animals of various types