Question

(a) Select the homologous structures from the combinations given below:
(i) Forelimbs of whales and bats
(ii) Tuber of potato and sweet potato
(iii) Eyes of octopus and mammals
(iv) Thorns of Bougainvillea and tendrils of Cucurbita

(b) State the kind of evolution they represent. [2]

Answer 1

(a) (i) Forelimbs of whales and bats and (ii) thorns of Bougainvillea and tendrils of Cucurbita are homologous structures. [1]

(b) These structures are fundamentally the same but have different functions due to adaptations to different needs. This kind of evolution is called divergent evolution. [1]