| A | B |
|---|
| organisms | living things |
| cell | basic unit of structure and function in an organism |
| unicellular | single-celled organisms, composed of only one cell |
| multicellular | organisms composed of many cells |
| development | process of change that occurs during an organism's life to produce a more complex organism |
| stimulus | change in an organism's surroundings that causes the organism to react |
| response | an action or change in behavior |
| reproduce | ability to produce offspring similar to the parents |
| spontaneous generation | mistaken idea that living things arise from nonliving sources |
| controlled experiment | when a scientist carries out two tests that are identical in every respect except for one factor |
| independent variable | one factor that the scientist changes to test |
| autotrophs | organisms that make their own food |
| heterotrophs | organisms that cannot make their own food |
| homeostasis | maintenance of stable internal conditions despite changes in the surroundings |
| fossil | ancient remains of living organismx |
| growth | to get larger |
| dependent variable | the result of the test which is measured |
| habitat | where an organism lives and gets what it needs for life |
| photosynthesis | process plants use to make simple sugars |
| water | most abundant chemical in the body |
