Evolution

Evolution

1. Extinction

   • Death of an entire species
   • Dinousars

2. Adaptation

   • A trait that helps the entire population
   • Dense Bones

3. Mutation

   • Random changes in DNA
   • One seal is born with a change in its DNA sequence that makes its flipper wider

4. Natural Selection

   • Organisms with helpful traits survive better
   • Due to a change in the environment, a few gray moths are able to blend in to the environment better and survive long enough to produce offspring

5. Environmental Pressure

   • Activities or factors that cause change within the ecosystem
   • A drought, so the land is too dry

6. anatomical Similarity

   • Organisms with similar skeleton may have come from a common ancestor
   • The arm of a human is similar to the leg of a cat, the flipper of a whale, and the wing of a bat