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Chemistry LibreTexts

Evidence of Evolution

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  • homology1_573e33db8d8ad.jpg

    Evidence for evolution comes from several sources. 

    • Fossils provide evidence of evolution - fossils in older layers are more primitive than newer layers
    • Geography can provide evidence - island species most closely resemble the nearest mainland species, and populations can show variation on different islands
    • Embryology provides evidence - crabs and barnacles have identical larvae - but different adult bodies
    • Anatomy can provide evidence - different species can have homologous structures - that have different functions, sometimes different species can have analogous structures - that have similar functions, vestigial structures also are evidence of evolution - structures that had a function in an early ancestor

    Watch the Teacher's Pet video, Evidence of Evolution before moving on.