Biol 202

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Author:
Anonymous
ID:
65195
Filename:
Biol 202
Updated:
2011-02-09 01:54:47
Tags:
Biol
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Description:
invertebrate zoology
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  1. Origins of single-celled organism
    • Kingdom Protista-single celled eukaryote
    • 1.8-1.9 bya
  2. Mulitcellular (metazoans) origins
    544 to 580 mya (Ediacara fauna)
  3. What is Cambrian Explosion
    • Cambrian period when all extant vertebrate Phyla began
    • Paleozoic period
  4. What is the Burgess Shale
    • in Yoho National Park, BC
    • Walcott 1909 discovered origin of fossils
    • due to escarpment slide and hydrothermal vents
    • well preserved soft-bodied fossils
  5. What are the 3 classification schemes
    • Evolutionary History
    • Body Architecture
    • Habitats and lifestyles
  6. 3 Types of Evolution
    • Microevolution
    • Speciation
    • Macroevolution
  7. Microevolution
    • form of natural selection
    • over a short time period
  8. Speciation
    • due to reproductive isolation
    • over a long time
  9. Macroevolution
    • due to phylogenetic patterns
    • geological time period
  10. 3 types of ancestry
    • monophyletic
    • paraphyletic
    • polyphyletic
  11. Homologous characteristics
    shared ancestry
  12. Analgous
    convergent characteristics
  13. How does evolution progress?
    • Darwin
    • Random
  14. Darwin
    • Survival of the fittest
    • Gradual process
    • predictable

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