ebio Microevolution and Macroevolution
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Created by:
11grodskyj Plus on February 2, 2012
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12 terms
Terms | Definitions |
|---|---|
 Microevolution | evolution at or below the level of the species |
| Macroevolution | evolution that is above the level of species, such as orders and classes) |
| directional selection | average value of a trait is shifted in a particular direction (higher or lower) |
| stabilizing selection | acts to standardize the population around some average value. May be the most common type of selection |
| disruptive selection | the environment selects for the two extremes, against the average, splitting the population in two or more types |
| disruptive selection | diversifying selection is also known as what? |
| industrial melanism | replacement of a light morph by a dark morph in an industrialized area - nearly 200 species of Lepidoptera |
| adaptation | The adjustment or changes in behavior, physiology, and structure of an organism to become more suited to an environment |
| homologous structures | Structures derived from a common ancestor or same evolutionary or developmental origin, evidence of divergent evolution |
| analogous structures | Structures of different species having similar or corresponding function but not from the same evolutionary origin. Evidence of convergent evolution. Superficially similar, but structurally and developmentally different |
| divergent evolution | when an interbreeding population or species splits into two or more descendant species, resulting in differences |
| convergent evolution | When organisms evolve structures that have similar structures or functions in spite of their evolutionary ancestors being unrelated |
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