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4-5: Macroevolution
Macroevolution
| Term | Definition |
|---|---|
| deforestation | The cutting down or removal of large areas of trees, usually to make space for farms, buildings, or roads. It can harm animals, plants, and the climate. |
| naturally occurring | Something that happens on its own in nature, without human help. For example, a volcano erupting or a river flooding. |
| human induced | Something that happens because of human actions. For example, pollution, climate change, or building cities are human-induced changes. |
| species | a group of populations that can interbreed in nature and produce fertile offspring (offspring can reproduce) |
| adaptive radiation | the evolution of many diverse species from a common ancestor |
| cladogram | branching diagram that shows evolutionary relationships throughout time, based upon relatedness and common descent |
| structural evidence | presence or absence of body structures |
| molecular evidence | percent of similar DNA or similar amino acid sequence for a protein |
| extinction | the disappearance of a species; once all individuals are gone there will be no more reproduction. |
| mass extinction | high rates of extinction in a relatively short period of time; the number of species on earth declines by 50% or more |
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