1. (2pt) Charles Darwin studied finches on the Galápagos Islands. The finches on each island had slightly different beaks. According to Darwin, how did the finches all get different beaks?
2. (1pt) Define natural selection in your own words.
3. (2pt) Light-colored lizards move to an area where there is dark-colored sand. After many years, most of the lizards are dark-colored. Explain how this happened?
4. (3pts) There are 3 steps in species evolution. For each step, explain what happens in that step in your own words.
1 . Genetic isolation
2. Genetic divergence
3. Secondary contact