| A | B |
|---|
| phototropism | Plants respond to light by growing toward or away from it. |
| hibernation | A state of greatly reduced body activity that occurs during the winter. |
| dormancy | Organisms respond to adverse conditions with a period of lowered or suspended metabolism. |
| population | All the members of one species in a particular area. |
| eutrophication | The buildup over time of nutrients in freshwater lakes and ponds that leads to an increase in the growth of algae. |
| climate change | Change in the typical weather pattern in an area over a long period of time. |
| catastrophic disturbances | Fire, drought, flood, tornados, hurricanes, and earthquakes. |
| community | All the different populations that live together in an area. |
| environment | The air, water, minerals, organisms, and all other external factors surrounding and affecting a given organism at any time. |
| seasonal | Dependent on or accompanying the seasons of the year. |
| stimulus | A change in an organism’s surroundings that causes the organisms to react. |
| response | An action or change in behavior that occurs as a result of the stimulus. |
| response | An action or change in behavior that occurs as a result of the stimulus. |
| ecosystem | All the living and nonliving things that interact in an area. |
| community | All the different populations that live together in an area. |
| population | All members of one species in a particular area. |
| organism | A living thing. |
