| A | B |
|---|
| instinct | Nest-building in birds is a(n) _______, or inherited behavior |
| behavioral adaptation | actions that enable organisms to survive (Example: Spinning a web) |
| physiological adaptation | _________ are the work of body parts in response to stimuli.(Example: Responding to blight light by blinking.) |
| stimulus | a change that causes a reaction |
| reflex | automatic response to a stimulus |
| natural selection | the process by which organisms best adapted to an environment survive |
| fossils | ________ give clues about organisms that live long ago. |
| evolution | genetic changes in a species over time |
| population | all the organisms of a species that live in a certain plave |
| adaptation | an inherited trait that helps a species get food |
| response | a reaction to a stimulus |
| learned behavior | an action that is not inherited from the parents |
| Charles Darwin | __________discovered that species had adapted to their different environments. |
| internal stimulus | A stimulus that originates within an organism |
