4. critical thinking evaluating
use scientific evidence to evalu-
ate darwin's theory of evolution
by natural selection.

Explanation:

1.) All organisms differ in traits such as size and behavior.  

2.) No two individuals are exactly alike.  

3.) There was a gradual change in each species.  

4.) Fossils were different from the living animals. However, these fossils had many similarities to modern forms of life.  

5.) Species on the Galapagos Islands resembled species on the mainland but they were different in certain characteristics.  

6.) Some organisms became isolated on many islands.