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case western reserve university

EVOLUTIONARY BIOLOGY

 

WHAT ARE THE GOALS OF EVOLUTIONARY BIOLOGY?

  • To discover the history of life on Earth
    • determine ancestor-descendant relationship among all species that have ever lived -- phylogeny
    • determine times of species origin and extinction
    • determine the rate and course of change of and origin of a species' characteristics
  • To understand the causal processes of evolution
    • origins of hereditary variation
    • how do various processes act to affect the fate of these variations?
    • understand the relative importance of the many co-acting processes of change
    • how rapidly do these changes occur?
    • natural selection, mutation, genetic drift, gene flow, diverse molecular, anatomical, behavioral and other characteristics of different organisms ... how does this happen?
    • how do populations of one species become different species?