New Species and Speciation

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    • SPECIATION is the formation of a new species.
      • 1 cause of speciation is the geographical separation of populations
  • populations of the same species
    • become separated geographically e.g. they move to different islands; the environment between them changes so they can't cross it
      • natural selection is the different areas favours different variations of characteristics
        • characteristics of each population change due to natural selection
          • characteristics may become so different that individuals from different populations could not interbreed successfully even if they were in the same area
            • they are now different species
    • each population has a wide range of alleles that controls their characteristcs


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