| A | B |
|---|
| fossil | the remains of traces of long dead organisms |
| acquired trait | a trait that is determined by enviroment, not genes |
| adapt | the ability of organisms to change to surroundings |
| natural selection | the process that drives evolution |
| population | all the same organisms in a specific area |
| fitness | the likelihood of an organism to survive and reproduce |
| adaptive selection | the spreading of new species outward from an ancestor |
| analogous | an example is the wings of birds and insects |
| coevolution | the evolution of two different species with each other |
| convergent evolution | the evolution of two different species that look the same |
| divergent evolution | species becoming more and more distant |
| homologous | a feature that shows similar form but not function |
| vestigial | a structure that no longer serves a function |
| sexual selection | selection based on sexual traits |
| biological species concept | the modern definition of a species |
| geographic isolation | the formation of species because of a barrier |
| morphology | the body shape of an organism |
| punctuated equilibrium | quick,sudden changes in species formation |
| reproductive isolation | the isolation of 2 species without a geographical barrier |
| speciation | the fromation of a new species |
