Evolution - the change in physical traits of a species over successive generations

• Due to the presence of genetic variation

• Caused by natural selection

Evolution

• It isn't always slow!

  • Some evolutions (like lactose intolerance in humans) can occur in less than 10,000 years

• It isn't always naturally-occurring!

  • Humans can guide the evolution of organisms to better suit their needs

• Not every evolved trait has an easy explanation!

  • That's like saying "The human nose evolved to hold glasses"

• An entire species doesn't have to evolve in the some way!

  • Let's look at finches!
    

Misconceptions about evolution