Biology 17.4
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Biology 17.4

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Biology 17.4 Biology 17.4 Presentation Transcript

  • 17-4 Patterns of Evolution
  • Macroevolution
    Large-scale evolutionary changes that take place over long periods of time.
  • Adaptive Radiation
    Process by which a single species or small group of species evolves into several different forms that live in different ways; rapid growth in the diversity of a group of organisms.
  • Convergent Evolution
    Process by which unrelated organisms independently evolve similarities when adapting to similar environments.
  • Coevolution
    Process by which two species evolve in response to changes in each other.
  • Punctuated Equilibrium
    Pattern of evolution in which long stable periods are interrupted by brief periods of more rapid change.
  • Key Concept
    Six important topics in macroevolution are extinction, adaptive radiation, convergent evolution, coevolution, punctuated equilibrium, and changes in developmental genes