| A | B |
|---|
| cell membrane | A barrier between the inside of a cell and the outside environment |
| organelles | Structures inside the cell that enable the cell to live, grow and reproduce |
| cytoplasm | Fluid inside the cell that surrounds the organelles |
| nucleus | Membrane-covered organelle that holds the cell's DNA |
| prokaryotic | Cell that does not have membrane-covered organelles; also called bacteria |
| eukaryotic | Complex cells that have a nucleus and other organelles |
| bacteria | Prokaryoitc cells |
| cell | The basic unit of life; means 'little room' |
| ribosomes | Tiny round organelles that act like little protein factories |
| multicellular | Made of many cells |
| unicellular | Made of only one cell |
| volume | The amount of space inside a structure |
| surface area | The measurement of area on the outside of a structure |
| surface to volume ratio | the area of cell's outer suface compared to its volume |
