Evolution

• What is the theory of evolution?

  All of todays species have evolved from simple life forms that first started to develop over three billion years ago
• What would happen to animals less well adapted to an environment/

  They would be less likely to survive and reproduce, therefore they wouldn't pass on characteristics
• What happens to beneficial variations?

  They get passed onto other generations
• Why do phenotypic variations arise?

  Genetic variants produced by mutations
• What is the development of a new generation called?

  Speciation
• When does speciation happen?

  When populations of the same species change enough to become reproductively isolated
• Name 5 reasons for extinction

  Environmental change, predator, disease, can't compete for food, catastrophic event