| A | B |
|---|
| organism | a living thing |
| cell | basic unit of structure and function |
| unicellular | made of one cell |
| multicellular | made of many cells |
| development | process of change, becoming more complex |
| growth | getting larger in size |
| stimulus | causes an organism to react |
| reaction | action or change in behavior |
| reproduce | ability to produce offspring |
| spontaneous generation | idea that life can arise from non-life |
| controlled experiment | tests that are the same except for one factor |
| variable | one factor that is different in an controlled experiment |
| autotrophs | organisms that can make their own food |
| heterotrophs | organisms that CANNOT make their own food |
| water | compound needed by all living organisms to survive |
| homeostasis | keeping stable internal conditions |
| living space | shelter needed by all living organisms |
