| A | B |
|---|
| ATP | A molecule in all living cells that acts as fuel |
| Binary Fission | Reproduction in which a bacterial cell divides into two cells that look thesame as the original cell. |
| Cell Theory | A theory that all living things are made of cells, that cells are the basic units of structure and function in living things, and that cells only come from already present cells |
| Circulatory System | A collection of organs, including the heart, which moves blood and gases throughout the body |
| Concentration | A measurement of the amount of dissolved substance in a fixed amount of solvent |
| Concentration Gradient | A difference in the concentration of a substance across a distance |
| Diffusion | The movement of molecules from an area of high concentration to an area of low consentration |
| Epithelial cell | A skin cell |
| Equilibrium | A state where concentrations are equal in all parts of an area |
| Eukaryote | A cell with several internal structures, including the nucleus, that are surrounded by membranes |
| Homeostasis | The ability of organisms to maintain their internal conditions |
| Hormone | A chemical signal used to control body function |
| Hypertonic | A solution whose solute concentration is higher than the solute concentration of another solution |
| Hypotonic | A solution whose solute concentration is lower than the solute concentration of another solution |
