| A | B |
| Cell Theory | All living things are composed of cells. |
| organism | a living thing |
| Cell Theory | All cells are produced by other cells |
| cell | The basic unit of living things |
| membrane | like a baggy holding the cell together |
| cytoplasm | liquid that fills the cell |
| organelles | the little parts of the cell |
| nucleus | protects the DNA (chromosomes) |
| mitochondria | energy center that burns sugars for energy |
| cell wall | rigid outside wall that gives plants shape |
| vacuole | stores and moves chemicals |
| chloroplasts | turn light, carbon dioxide, and water into oxygen and sugars to store energy |
| bacteria | simpler single-celled organisms |
| viruses | not like cells, but reproduce |
| microscope | tool used to magnify slides |
| stage | where you put slides on a microscope |
| magnification | how close yo can see |
| Hooke | described cork cells |
| unicellular | one celled organism |
| multicellular | many celled organism |
| Cell Theory | The cell is the basic unit of living things. |