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Evolutionary Evidence
Fossil record Comparative anatomy Comparative Embryology Comparative Biochemistry Geographic distribution
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Fossil Record Remains of once living organisms.
Found in sedimentary rock. Simpler forms of life at bottom. Limited: Type of material preserved (bone, shell, impressions, amber) Incomplete record Easily disrupted
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Comparative Anatomy Homologous structures Vestigial structures
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Homologous Structures
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Vestigial Structures Human Salamander, Whale, Boa
Functional limb on salamander is probably Similar to the limb of common ancestor.
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Comparative Embryology (Early 1800’s)
2006 UCBerkeley
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Chick Embryo vs. Human Notice the human embryo has gill slits.
2006 UCBerkeley Notice the human embryo has gill slits.
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Comparative Biochemistry
Similar DNA Sequences Similar Gene segments of the DNA Code for similar traits in closely related species
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Similar DNA In Organisms
DNA Sequencing- 0.1% difference between any person. - 1.5% between human and chimp. . 2006 UCBerkeley
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