| A | B |
|---|
| organism | A living thing. |
| cell theory | An explanation of the relationship between cells and living things. |
| nucleus | The control center of the cell. |
| microscope | An instrument that makes small objects look larger. |
| prokaryote | An organism whose cells do not have a nucleus. |
| asexual reproduction | The reproductive process that involves only one parent. |
| unicellular | An organism that is made of only one cell. |
| multicellular | An organism that is made of more than one cell. |
| autotroph | An organism that makes its own food. |
| heterotroph | An organism that cannot make its own food. |
| sexual reproduction | The reproductive process that involves two parents. |
| eukaryote | An organism whose cells do have a nucleus. |
| taxonomy | The scientific study of how living things are classified. |
| classification | The process of grouping things based on their similarities. |
| domain | The highest taxonomic group of living things. |
| kingdom | The next level of taxonomic grouping below domains. |
| cells | The building blocks of living things. |
