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Homologous organs have similar embryonic origin and anatomical structure but perform different functions. Hind limbs of birds and reptiles share common ancestry and bone structure despite birds using them for perching/walking and reptiles for locomotion. Wings of bat and bird (B) are analogous - similar function but different origin. Pectoral fins of fish and bird wings (C) are analogous. Wings of bat and locust (D) are analogous.