Evolution in a nutshell

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Evolution in a nutshell

  1. 1. Evolution in a Nutshell Key Terms And Concepts
  2. 2. Darwin vs. Lamarck• Lamarck’s Theory of Evolution = traits are acquired through habit/experience• Darwin’s Theory of Evolution = descent with modification due to Natural Selection – those organisms with beneficial traits survive, reproduce and pass on trait.• Both Theories = common ancestors.
  3. 3. Evidence for Common Ancestors• Embryology – development of embryo reflects ancestors. Ex. Human embryo has gills, ancestor was fish.• Macromolecules – the more similar the more closely related. Must have similar genes/DNA.• Vestigial Structures – feature once useful to ancestor, no longer useful to current organism• Biogeography – distribution of orgs and fossils.• Homologous and Analogous structures -
  4. 4. Embryology
  5. 5. Macromolecules
  6. 6. Vestigial Structures
  7. 7. Biogeography
  8. 8. Types of EvolutionDivergent Convergent Phyletic
  9. 9. Divergent Evolution
  10. 10. Convergent Evolution –Similarcharacteristics, similar environment.
  11. 11. Phyletic
  12. 12. Coevolution
  13. 13. Classification• Kingdom, Phyllum, Class, Order, Family, Genus, Species.• All “known” organisms have been classified.• Kingdom is largest category, Species is smallest.• Scientific name is Genus species.• Homo sapiens = human• The more categories in common the more closely related two organisms are.

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