Question

why is cross pollination said to be better than self pollination

Answer 1

Cross pollination is better than self pollination as it bring about genetic variation in the offsprings. More the genetic variation more is the chance of survival in changing environment and adverse condition. This also decereses the chances of passing of genetic diseases in the offsprings as two parents are involved.

Answer 2

cross pollination is said to be better than self pollination because in self pollination the pollen grains from the similar go to the flower but in cross pollination the pollen grains of one flower goes to another ovary for fertilisation