| A | B |
|---|
| natural selection | The process where only the organisms best adapted to their environment tend to survive and reproduce |
| evolution | theory of how different species of organisms are genetically related |
| variation | genetic differences that exist among individual members of a species |
| mutation | random and accidental genetic change in an organism's DNA |
| adaptation | trait that helps an organism survive and reproduce in its habitat |
| Darwin | 19th century naturalist that theorized natural selection |
| genus | first of the two scientific names given any organism |
| species | group of similar organisms that can breed and produce fertile offspring |
| speciation | creation of new species through various genetic changes over generations |
| sapiens | species name for humans |
| fossil | trace or remains of once-living organisms found in sedimentary rock |
| homo | genus name for humans |
| Australopithecus | genus name for Lucy |
| Beagle | His majesty's ship that sailed Darwin |
| Galapagos | Islands where Darwin studies finches |
| trait | genetically determined characteristic |
| fertile | ability to produce offspring |
| homologous | same structure |
| homonid | human type animal |
| australopithecus | southern ape |
| bipedal | walks on 2 feet |
