AIPMT | 2014EvolutionMediumBloom L1

Question

Forelimbs of cat, lizard used in walking; forelimbs of whale used in swimming and forelimbs of bats used in flying are an example of :

Options

A.Analogous organs
B.Adaptive radiation
C.Homologous organs
D.Convergent evolution

Solution

(c) [Key Concept: Homologous Organs — Vertebrate Forelimbs] Forelimbs of cat, lizard, whale, and bat are homologous organs. They have a common fundamental anatomical plan and similar embryonic origin (vertebrate forelimb/pentadactyl limb) whatever varied functions they perform (walking, swimming, flying). The flippers of a whale, a bat's wing, forelimb of cat/lizard and forelimbs of human are structurally as well as functionally different but all are modified forelimbs.

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