| A | B |
|---|
| cells | the basic unit of a living thing that can perform all the processes associated with life |
| energy | the ability to make things move or change |
| metabolism | the balance between an organism's energy producing process and its energy using processes |
| stimulus | a change that occurs in the environment |
| response | reaction to a chamge that occurs in the environment |
| development | a cycle of change that an organism undergoes during development |
| reproduction | the process by which organisms produce more organisms like themselves |
| adaptation | a characteristic that enables an organism to live and reproduce successfully in its environment |
| spontaneous generation | the thought that living things come from nonliving things |
| homeostasis | the ability of an organism to keep conditions inside its body the same even though conditions in the environment change |
| endothermic | animals that can maintain a constant body temperature |
| ectothermic | animals that have body temperatures that can change somewhat in response to environmental changes |
| competition | the struggle among living things to get the proper amount of water, food, and energy in a living space |
