Evidence for Evolution

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Evidence for Evolution

• Evidence of change

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1. Homologous Analogous Structures

• Homologous Structure Similar features shared by
  ancestors.
• Ex. Beaks of birds or forelimbs
• Analogous structures that serve identical
  functions and look somewhat alike.
• Ex. Wings of birds and insects.

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2. Vestigial Structures

• Structures useful to ancestors but not useful to
  modern organisms.
• Ex. Tailbone in humans

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3. Similarities in Embryology

• In early embryologic development, all vertebrate
  embryos are similar.

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4. Similarities in Macromolecules

• Comparison of DNA or RNA of different species.