| 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 |
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