| A | B |
|---|
| Homeostasis | the maintenance of a stable internal environment within an organism |
| Diffusion | particles of a substance can move through cell membranes from areas of high concentration to areas of low concentration. |
| Osmosis | the diffusion of water molecules across a membrane |
| Photosynthesis | the process that plants use for making their own food (glucose). It occurs in the chloroplasts of the cell. |
| ATP | is produced by cellular respiration in the mitochondria and photosynthesis in chloroplasts |
| DNA | a substance that carries genetic information in the cells of plants and animals |
| Levels of organization | shows the relationships of atoms to cells to organisms |
| Cells | the basic units of life containing organelles that perform specific functions |
| Tissues | a group of cells working together to perform a function |
| Organs | a group of tissues working together to perform a function |
| Organ systems | a group of organs working together to perform a function |
| Organism | a group of organ systems working together to carry out life processes |
