evolution

• What is evolution defined as in the study material?


  Evolution is a change in the inherited characteristics of a population over time.
• How does natural selection contribute to evolution?

  Natural selection may result in the formation of a new species.
• What does the theory of evolution by natural selection state?


  All species of living things have evolved from simple life forms.
• How long ago did simple life forms first develop according to the theory of evolution?


  More than three billion years ago.
• natural selection steps:

  • individuals in a species show variation due to differences in genes as a result of mutation during sexual reproduction or meiosis
  • individuals with characteristics most suited to the environment survive and reproduce
  • pass on genes to next gen