speciation

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spe·ci·a·tion

(spē'shē-ā'shŭn),
The evolutionary process by which diverse species of animals or plants are formed from a common ancestral stock.

speciation

/spe·ci·a·tion/ (spe″se-a´shun) the evolutionary formation of new species.

speciation

(spē′shē-ā′shən, -sē-)
n.
The formation of new biological species through the process of evolution.

spe′ci·ate′ v.
spe′ci·a′tion·al adj.

spe·ci·a·tion

(spē'shē-ā'shŭn)
The evolutionary process by which diverse species of animals or plants are formed from a common ancestral stock.

speciation

the process by which new species are formed. Speciation occurs when gene flow has effectively ceased between populations where it previously existed and is brought about by ISOLATING MECHANISMS.see GEOGRAPHICAL ISOLATION.
References in periodicals archive ?
This generates imbalance even in the absence of trait evolution, because lineages which (by chance) are assigned low speciation rates tend to retain them: only by speciating could they regain a high speciation rate, but only with a high speciation rate are they likely to speciate.
It is easy, therefore, to find the expected number of substitutions until the "average" of our [Mathematical Expression Omitted] pairs of populations speciates.
One definition of adaptive radiation is that some organisms have features that allow them to speciate more prolifically or become extinct less frequently than organisms without these features.