| A | B |
| homologous structure | come from the same tissue; different mature forms |
| natural selection | organisms that are best adapted to their environments survive and produce offspring |
| convergent evolution | Two different organisms in the same environment have similar adaptations |
| relative dating | Age is determined by looking at the layer in which the fossil is found |
| radioactive dating | isotopes in fossils are used to give more exact dates |
| artificial selection | humans select traits in organisms that they desire |
| coevolution | 2 organisms evolve in response to changes in each other |
| evolution | change over time |
| alternation of generations | organism switches between haploid and diploid stages |
| gametophyte | haploid |
| zygote | diploid |
| adaptive radiation | organisms move from their original habitats and new adaptations cause them to become new species |
| Charles Darwin | wrote a theory on evolution |
| Carolus Linnaeus | designed binomial nomenclature |
| geographic isolation | organisms become new species after being separated by a barrier over time |
| reproductive isolation | organisms cannot interbreed and form fertile offspring |
| behavioral isolation | organisms can interbreed but do not because of differences in mating rituals |
| temporal isolation | organisms can interbreed but do not breed during the same times |
| Classification levels in a scientific name | genus & species |