evolution

• who was the theory of evolution by natural selection discovered by 


  charles darwin
• what is natural selection 


  -some characteristics give advantage to survival of species as they have to compete continuously for limited resources

  -successful competitors would be more likely to survive(survival of the fittest)and reproduce, to pass on genes that made them successful to offspring

  -over generations beneficial characteristics become more common and species adapt/evolve
• what is the development of new species called 


  speciation
• what is speciation 


  when an organism evolves so much over time that a completely new species is formed
• why do species become extinct 


  -environment changes to quickly(no time to adapt properly)

  -new predator kills them

  -new disease kills them

  -catastrophic event(volcano erupting)