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| idea that a species is a population or group of populations whose members have the ability to breed successfully in nature but not to interbreed successfully with members of other species | ||
| Model of evolution in which long periods of little change in a species are broken by shorter times of more rapid change | ||
| Scale that organizes Earth's history into four eras | ||
| Method of dating fossils based on radioactive isotopes | ||
| Diagram that reflects hypothesized evolutionary relationships | ||
| Process in which unrelated species from similar environments have adaptations that seem very similar | ||
| Homologous structure that does not occur outside a particular clade | ||
| Process in which new species form | ||
| This event occurs when some kind of reproductive barrier develops that prevents interbreeding | ||
| Huge numbers of species going extinct in a short period of time | ||
| Surviving species becoming more diverse as they adapt to new environments | ||
| Occurred at the end of the Paleozoic Era; results in the supercontinent | ||
| Condition that may be either geographic or reproductive | ||
| Process results in new species | ||
| Scientists study the development of organisms | ||
| Example of this is speciation | ||
| Diagrams based on derived characters | ||
| Two names | ||
| Science that classifies organisms | ||
| Taxonomic category that is broader than a kingdom | ||
| Both homologous and analogous forms of these result from evolution |
