biology unit 1- evolution

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Theories of evolution

  • life on earth began 3billion years ago
  • JEAN BAPTISE LAMARCK- characteristics developed through persons life time can be passed onto offspring e.g. muscle- NO
  • CHARLES DARWIN- natural selection, small changes in organisms took placeover a very long time, those that are best adapted breed and pass on good survival characteristics e.g birds adapting beaks- YES
  • nobody believed him because nobody knew about genes, everybody believed God made everything on earth
  • MUTATION---VARIATION---ADAPTATION---SURVIVAL---BREED---NS
  • mutations change genes

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