| A | B |
|---|
| heterotroph | an organism that cannot make their own food |
| autotrophs | organisms that make their own food |
| unicellular | a single-celled organism |
| multicellular | an organism composed of many cells |
| organism | a living thing |
| homeostasis | the maintenance of stable internal conditions |
| spontaneous generation | the idea that living things can arise from non-living things |
| stimulus | a change in an organism's surroundings that cause it to react |
| response | a reaction from a stimulus |
| cell | the basic unit of structure and function in an organism |
| classification | the process of grouping things based on their similarities |
| taxonomy | the study of how organisms are classified |
| binomial nomenclature | a two-part scientific naming system |
| domain | the broadest level of organization |
| prokaryote | a unicellular organism which lacks a nucleus |
| eukaryote | organisms with cells that contain nuclei |
| evolution | the process of change over time |
| branching tree diagram | a diagram that shows probable evolutionary relationships |
