| A | B |
|---|
| autotroph | an organism that can make its own food |
| heterotroph | an organism that cannot make its own food |
| reproduce | to produce more of the same kind |
| stimulus | a change in an organism's environment that causes a response |
| response | the reaction to a stimulus |
| classify | to sort objects or organisms into groups based on similar characteristics |
| organism | a living thing |
| photosynthesis | process by which green plants produce their own food |
| respiration | a process in which food is broken down to release energy |
