Which energy source contributes least to global warming? a. petroleum b. coal c. oil d. geothermal

The finches on the galapagos island were similar in form except for variations of their beaks. darwin observed that these variations were useful for: attracting a mate defending territory building nests gathering food

Give two examples of what would occur if one of the pairs did not match or had an extra chromosomes. explain how this might occur, and if it would be dangerous to the individual. fast.

Which of the following explains why a tree is often used as a model to represent the principle of common descent