| A | B |
|---|
| theory | an explanation that ties together many hypotheses and observations |
| change | a transformation from one phase to another |
| evolution | the change in a population's inherited traits from one generation to another |
| biological evolution | the change over time of living organisms |
| organic evolution | another name for biological evolution |
| species | the most specific classification of living things |
| natural selection | survival of the fittest |
| adaptation | a process that helps a population adjust to its environment or habitat |
| speciation | species-splitting |
| competition | the interaction between organisms in which one is lowered by the presence of the other |
