| A | B |
|---|
| cell | a membrane- covered structure that contains all of the materials necessary for life |
| stimulus | A change in an organism's environment that affects the activity of that organism |
| homeostasis | The maintenance of a stable internal environment |
| asexual reproduction | a single parent produces offspring that are identical to the parent |
| sexual reproduction | requires two parents to produce offspring that will share characteristics of both parents. |
| DNA | Provides instructions for making molecules called proteins |
| heredity | The transmission of characteristics from one generation to the next. |
| metabolism | The total of all of the chemical activites that it performs. |
