Traces of organisms that lived in the past and were preserved by natural process or catastrophic events, fossils, comparative anatomy, embryonic development, genetic information, These are structures of unrelated species that may evolve to look alike , because the structure is adapted to similar function, or it may have similar functions but have different origin., Vestigial Structures, Homologous Structures, Analogous Structures, Embryonic development, Where can most of the fossils be found?, Sedimentary rock, Granite rock, Lava flows, Black soil, Which pairs of animals shows a correct example of homologous structures?, Wings of butterfly and wings of bat., Flipper of whale and forelimb of cat., Fingers of human and arm of starfish, Tongue of frog and proboscis of mosquito..

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