| A | B |
|---|
| nucleus | directs all cell activities |
| homeostasis | the maintenance of steady internal conditions |
| cell membrane | allows materials to move in and out of cell |
| organism | living thing |
| cell wall | protects and supports the plant cell |
| mitochondria | generates energy for the cell |
| response | reaction of an organism to a stimulus |
| adaptation | characteristic of an organism that helps it survive in its environment |
| lysosomes | digests wastes inside the cell |
| life span | the length of time an organism lives |
| development | changes that living things undergo as they grow |
| cell | smallest unit that carries out the activites of life |
| stimulus | anything an organism reacts to |
| endoplasmic reticulum | directs materials (traffic) around inside the cell |
| vacuole | stores food, water, and wastes |
| organs | groups of similar tissues working together |
| golgi bodies | cell structures that package proteins |
| chromatin | contains genetic blueprints of the cell |
| stereo microscope | used for viewing thick objects |
| electron microscope | can magnify up to 1,000,000 times |
