Question

Distinguish between convergent and divergent evolution.

Answer 1

1. Convergent evolution. - This is a phenomenon where structures from different embryonic origins are modified to perform the same function. E.g. wings of birds and those insects, eyes of human beings and those of octopus;
2. Divergent evolution. - This is a phenomenon where one basic structural form is modified to give rise to various different forms which perform different functions. E.g. pentadactyl limbs of vertebrates, shapes of beaks in birds;