单词	microevolution
释义	microevolution /ˌmʌɪkrəʊiːvəˈluːʃ(ə)n / /ˌmʌɪkrəʊiːvəˈluːʃ(ə)ɛv/ noun [mass noun] Biology Evolutionary change within a species or small group of organisms, especially over a short period.Resting eggs of planktonic organisms from datable sediment cores are increasingly used to reconstruct historical information on the abundance, size, genetic composition, and microevolution of planktonic organisms.... They already acknowledge microevolution - mutation and natural selection within a species. The creation science folks accept microevolution but not macroevolution. Derivatives microevolutionary adjective ... First, genes expressed predominantly in males and the male germ line, and thus often subject to accelerated microevolutionary divergence, may be most likely to be deregulated in hybrids. Thus, adaptation-oriented studies of characters have expanded from microevolutionary studies of function and fitness to include macroevolutionary studies of phylogenetic patterns. To apply phylogenetic reasoning to questions about species status requires broadening of simple principles when microevolutionary processes may result in true differences among gene phylogenies.
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