CBSE Class 7 Answered
Self pollination |
Cross pollination |
The pollen grains from a flower are carried to the stigma of the same flower or on the other flower of the same plant. |
The pollen grains from a flower are carried to the stigma of the flower on other plant. |
Such flowers do not need any pollinating agent. |
Such flowers need pollinating agents. |
Self pollination is less preferable from the genetical point of view since there is no mixing of genes. |
Cross pollination is more preferable from the genetical point of view since new characters can be be produced. |
The flowers need not spend energy on producing showy flowers or large number of pollens. |
The flowers need to spend large amounts of energy on producing large, showy flowers to attract pollinators as well as large number of pollens. |