| A | B |
|---|
| radioactive dating | measures the age of rock |
| index fossil | indicates a specific age |
| archeopteryx | transition between reptiles and birds |
| microevolution | change within a species |
| macroevolution | large scale evolutionary change |
| gene pool | all the genes of a population |
| allele frequency | the percentage of a gene in a gene pool |
| natural selection | best suited organisms survive |
| acquired characteristics | change during organism's lifetime is inherited |
| mutation | a change in a gene |
| gradualism | small constant change over long periods |
| punctuated equilbrium | long stable periods plus rapid burst of change |
| common descent | organisms share an ancestor |
| homologous structure | same ancestry, different purpose |
| analogous structure | same purpose, different ancestry |
| genetic drift | random changes in the gene pool |
| founder effect | small group forms a new population |
| embryology | study of embryo development |
| speciation | the formation of new species |
| bottleneck effect | genes wiped out by random events |
| divergent evolution | related organisms look different |
| convergent evolution | unrelated organisms look similar |
| coevolution | two species adapting to each other |
| adaptive radiation | one species becomes many |
| temporal isolation | breeding at different times |
| biogeography | distribution of organisms on Earth |
