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AP Biology Timeline

  1. 4.5 Billion years ago
    • Age of the earth
    • Out gassing produced H2O, H2, CH4, NH3, & more
    • Abiotic Synthesis of organic molecules
    • Protobiant
  2. Protobiant
    • Aggregates of abiotic molecules
    • Reactions occur
    • Molecular co-operations (RNA & Proteins)
  3. Stanley Miller Experiment
    • Molecular rearrangement
    • All 20 a.a.
    • purine/pyrimidine
    • carbs
    • fats 
    • ATP
  4. 3.5 BYA
    • First Cells-Oldest Fossils
    • Prokaryotic Heterotrophs
    • Fossil Stromatilites
  5. 3.0 BYA
    • First Prokaryotic Autotrophs
    • Produce O2
  6. 2.7 BYA
    O2 in atmosphere
  7. 2.2 BYA
    • First Eukaryotic Cells
    • -Endosymbiotic theory
    •        (mit. & chloroplast)
    • -Membrane infoldings
    •        (endomembrane system)
  8. 1.2 BYA
    • First multicelled organisms
    • Meiosis & Sexual Reproduction
  9. 580 MYA
    • Cambrian Explosion
    • -Origin of Animals
    •       -Nervous Systems
  10. 450 MYA
    First Fish
  11. 430 MYA
    Plants to land
  12. 400 MYA
    • Insects to land
    • O3 (Ozone)
  13. 380 MYA
    First amphibians
  14. 300 MYA
    • Pangea forms
    • Reptiles & Mammals
    • Fern Forests-Coal
  15. 250 MYA
    Permian Extinction (99%)
  16. 230 MYA
    Dinos Start
  17. 180 MYA
    • Pangea breaks up
    • First birds
  18. 150 MYA
    First Gymnosperms, Angiosperms
  19. 65 MYA
    • K-T event (Cretaceous extinction)
    • Dinos extinct (90% of everything)
  20. 50 MYA
    Large Herbivores
  21. 25 MYA
    Early primates
  22. 1.8 MYA
    Homo Sapien
Author
rileyrichardson
ID
203908
Card Set
AP Biology Timeline
Description
Study Guide
Updated

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