Microevolution



[mahy-kroh-ev-uh-loo-shuh n or, esp. British, -ee-vuh-] /ˌmaɪ kroʊˌɛv əˈlu ʃən or, esp. British, -ˌi və-/

noun, Biology.
1.
evolutionary change involving the gradual accumulation of mutations leading to new varieties within a species.
2.
minor evolutionary change observed over a short period of time.

microevolution mi·cro·ev·o·lu·tion (mī’krō-ěv’ə-lōō’shən, -ē’və-)
n.
Evolution resulting from a succession of relatively small genetic variations that often cause the formation of new subspecies.
microevolution
(mī’krō-ěv’ə-l’shən)
Evolutionary change below the level of the species, resulting from relatively small genetic variations. Microevolution produces new strains of microorganisms, for example, or the rise of a new subspecies. The accumulation of many microevolutionary changes results in macroevolution.

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