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Extinction and Speciation

Species become extinct because:

  • Environment changes
  • A new predator
  • A new disease
  • Can't compete for food with another species
  • A catastrophic event
  • A new species develops (Speciation)


  • Development of a new species
  • Population of same species become so different they can no longer breed
  • Isolation where populations of species are seperated e.g a flood
  • The slightly different conditions, and some of the species adapt to these new conditions
  • The ones with the characteristics most suited to their new environment reproduce and the ones that aren't die out eventually.
  • These changes keep happening until the 2 populations are different
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