Macroevolution

Macroevolution is the development of new taxonomic groups such as species, genera, families, etc.

  1. Trends - Cope's rule (body size increases - Equus).
  2. Mass extinctions
  3. Radiations
    1. Increase in diversity due to adaptation
    2. Cambrian explosion - The Cambrian Sea video
    3. Cretaceous explosion of angiosperms
    4. Placental mammals - end of Cretaceous
  4. Rates of evolution vary greatly
    1. Gradualism vs Punctuated Equilibrium

The goal of evolution is not to create more advanced organisms.