| A | B |
|---|
| tool used to study cells |  |
| person who studies cells |  |
| the smallest unit of a living thing | cell |
| cell membrane | controls what moves in and out of the cell |
| nucleus | control center of the cell |
| cytoplasm | gel-like liquid that fills the cell |
| chloroplasts | parts of plant cells that trap the Sun's energy |
| virus | tiny particle made up of living and nonliving things |
| cell wall | outside cell membrane; supports and protects cell |
| organism | highest level of cell organization |
