Question

Select two pairs from the following which exhibit divergent evolution. Give reasons for your answers.

(i) Forelimbs of cheetah and mammals

(ii) Flippers of dolphins and penguins.

(iii) Wings of butterflies and birds.

(iv) Forelimbs of whale and mammals.

Answer 1

(i) Forelimbs of cheetah and mammals

(ii) Forelimbs of whales and mammals

All these animals show similarities in Pattern of bones of forelimb but they perform different functions. They have similar anatomical structure. Hence, the same structural organs in these animals have developed in different directions because of adaptations to their different requirements. This shows thus the divergent evolution & that the structures/organs are homologous.