| Self pollination | Cross pollination |
| 1. Migration of pollen grains from anther to the stigma of the same flower (or same plant) is called self pollination. | Migration of pollen grains from anther to the stigma of another flower to another plant is called cross pollination. |
| 2. Mode of pollination is always wind or by touch. | Modes of pollination are external e.g. wind water or animals. |
| 3. Anthers and stigma mature at same time and lie close to each other. | Anthers and stigma many mature at different times and not essentially lie in proximity. |
| 4. No chances of new varieties. | Variations occurs at every new generation and thus leads to evolution. |
