| A | B |
| organism | a living thing |
| cell | the basic unit of life |
| unicellular | an organism made of one cell |
| multicellular | an organism made of more than one cell |
| development | the process by which an organism changes from simple to complex |
| stimulus | a change in an organism's environment that causes a reaction |
| response | a reaction to a stimulus |
| reproduce | to produce offspring/children |
| autotroph | an organism that can make its' own food |
| heterotroph | an organism that cannot make its own food |
| homeostasis | to maintain a stable internal environment |