| A | B |
|---|
| organism | a living thing |
| cell | basic unit of structure and function |
| hydrogen, oxygen, carbon | main elements of living things |
| 70 | percent of water in living things |
| circulate | water helps food to ___ through the organism |
| oxygen | used by organism to release energy |
| waste | water helps to remove this |
| adaptation | trait that helps an organism survive and change to fit its environment |
| tissue | group of cells with similar shape and function |
| organ | group of tissues that work together |
| system | group of organs that work together to carry on life activities |
| osmosis | movement of molecules to a less crowded place |
| diffusion | movement of water across a membrane |
| active transport | movement of molecules to a more crowded place |
