| A | B |
|---|
| adaptation | an inherited trait that helps a species survive in its environment |
| evolution | process that results in changes in the genetic makeup of a species over very long periods |
| natural selection | the idea that those organisms best adapted to their environment will be the ones most likely to survive and reproduce |
| structural adaptation | adaptation that involves body parts or color |
| population | all the organisms of one species that live in a certain place |
| stimulus | a change in the environment of an organism that causes a response |
| response | a reaction of an organism to a change in the environment |
| physiological adaptation | adaptation that involves a body part's job of controlling a life process |
| behavioral adaptation | an action that aids survival |
| instinct | an inherited behavior |
| reflex | quick, automatic response to a stimulus |
