| A | B |
| variable | something in an experiment that can be changed |
| phylogeny | the evolutionary history of an organism |
| binomial nomenclature | the system used by modern scientists to name organisms |
| genus | a group of similar species |
| scientific methods | a series of procedures in science |
| theory | an explanation of things or events based on scientific knowledge |
| kingdom | the first and largest category |
| spontaneous generation | the idea that living things come only from non-living things |
| homeostasis | a trait of all living things |
| organism | any living thing |
| hypothesis | a prediction that can be tested |
| control | the standard to which the outcome of the test is compared |
| biogenesis | replaced the theory of spontaneous generation in the mid 1800s - proved living things come only from other living things |
| law | statement about how things work in nature that seem to be true all the time |
| cell | the smallest unit of an organism that carries on the functions of life |