| A | B |
|---|
| organism | A living thing |
| unicellular | An organism that is made of a single cell. |
| multicellular | An organism consisting of many cells. |
| genus | A classification grouping that consists of a number of similar, closely related species. |
| development | The process of change that occurs during an organisms life to produce a more complex organism. |
| spontaneous generation | The mistaken idea that living things arise from nonliving sources. |
| controlled experiment | An experiment in which all factors are identical except one. |
| species | A group of similar organisms that can mate with each other and produce offspring that can also mate and reproduce. |
| autotroph | An organism that makes its own food. |
| heterotroph | An organism that cannot make its own food. |
| homeostasis | The maintenance of stable internal conditions. |
| binomial nomenclature | The system for naming organisms in which each organism is given a unique, two-part scientific name indicating its genus and species. |
