Question

mention two stroteges evolved to prevent self pollination?

Answer 1

Answer:

The strategies evolved to prevent self-pollination in flowers are: 1) Dichogamy- The maturation of anthers and stigma at different time in a bi-sexual flower which prevents self-pollination. 2) Self-incompatibility: The pollen grains of a flower are not capable of completing growth on the stigma of the same flower.

Explanation:

Hope this helps you.

Answer 2

Answer:

1)herkogamy 2) self sterility or self incompatability 3) different maturing periods for androecium and gynoecium (protandrous and protogynous) 4)only one type of flowers present in a plant ( either Male flowers only or Female flowers only)