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7.4 The Evidence for Evolution

7.4 The Evidence for Evolution. Unit 4: Evolution. Evidence for evolution. Types of evidence Darwin used to support his theory: -biogeography -homologous and analogous features -vestigial features. Biogeography + Darwin’s Observations. Testing Darwin’s Hypotheses Hawaiian Islands.

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7.4 The Evidence for Evolution

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  1. 7.4 The Evidence for Evolution Unit 4: Evolution

  2. Evidence for evolution Types of evidence Darwin used to support his theory: -biogeography -homologous and analogous features -vestigial features

  3. Biogeography + Darwin’s Observations

  4. Testing Darwin’s HypothesesHawaiian Islands

  5. Testing Darwin’s Hypotheses • When non-native mammals and amphibians introduced to islands, they have been able to thrive. This eliminates the possibility that they can’t survive on remote islands.

  6. Homologous features • Structures with common evolutionary features which serve different functions in modern species • Video on homology: http://www.youtube.com/watch?v=XgXT9sU6y18&feature=related http://www.xspore.com/community/drama/6876-evolution-vs-religion-4.html

  7. Analogous Features • Structures that perform same function in two species but are not similar in origin or anatomy

  8. Vestigial Features • Features that no longer serve the function they do in similar species http://paxarcana.wordpress.com/2009/08/25/your-appendix-may-actually-do-something/ http://www.youtube.com/watch?v=lBkiT0zyYm0 http://rebeccamcc.blogspot.com/

  9. Competition within populations • All species produce more offspring than can survive to reproduce • This results in competition for resources between members of the same species

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