| A | B |
| ORGANISM | any living thing that can carry out its life on its own |
| CELL | the smallest unit of living matter |
| UNICELLULAR | a one-celled organism |
| MULTICELLULAR | many-celled organism |
| CHLOROPHYLL | a green chemical in plant cells that allows plants to use the sun's energy to make food |
| TISSUE | a group of similar cells that work together at the same job |
| ORGAN | a group of tissues working together to do a certain job |
| ORGAN SYSTEM | a group of organs that work together to do a certain job |
| MICROSCOPE | an instrument that produces an enlarged image of an object |
| PHOTOSYNTHESIS | the process in green plants that uses sunlight to create food |