variation

• variation

  *in offspring it is as a result of both genes and environmental factors (cause different phenotypes)
• Darwins theory

  *random mutations are present in organisms and result in variation

  *some organisms have an advantage to their environment and adapt better

  *organisms w/o advantage are eaten by predators

  *overtime the ones with genetic advantage survive and reproduce more

  *they produce fertile offspring who inherit these mutations from their parents
• evolution


  natural selection of genetic changes that give rise to the phenotypes that are best suited for the environment