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Speciation, the formation of new and distinct species in the course of evolution. Speciation involves the splitting of a single evolutionary lineage into two or more genetically independent lineages.
Speciation is defined by the International Union of Pure and Applied Chemistry (IUPAC) as âthe distribution of an element amongst defined chemical species in a systemâ. Speciation is defined by the International Union of Pure and Applied Chemistry (IUPAC) as âthe distribution of an element amongst defined chemical species in a systemâ. Chemical species include isotopic composition, oxidation or electronic states, and molecular structures.