| A | B |
|---|
| Change in env. that caus response | Stimuli |
| envelope of gases around earth | atmosphere |
| anim. that have stable body temp. | endothermic |
| basic unit that can perform life processes | cell |
| chemical changes that happen in an organism | metabolism |
| thin zone on earth that supports life | biosphere |
| organism can keep its body the same | homeostasis |
| characteristic that enables an organism to survive and reproduce | adaptation |
| struggle between living things for survival space | competition |
| reacting to a stimulus in an environment | response |
| animals that can't regulate their body temp. | ectothermic |
| process that produces more organisms | reproduction |
