| A | B |
|---|
| cell | the basic unit of all forms of life |
| cell theory | (1) all living things are composed of cells, (2) cells are basic units of structure and function in living things, (3) new cells are produced from existing cells |
| cell membrane | is a thin, flexibile barrier around the cell |
| cell wall | a strong layer around the cell membrane |
| nucleus | a large structure that contains the cell's genetic materical and controls the cell's activities |
| cytoplasm | the material inside the cell membrane, but not including the nucleus |
| prokaryote | have cell membranes and cytoplasm but do not contain nuclei |
| eukaryote | cells that do contain nuclei and contain other specialized structures called organelles |
| organelle | specialized structures that perform important cellular functions |
