Formation of new species from pre-existing ones is

Mutation

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Speciation

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Isolation

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Polyploidy

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Solution

The correct option is B Speciation
Formation of new species from preexisting ones is known as speciation. Speciation, the formation of two species from one original species, occurs as one species changes over time and branches to form more than one new species. It can occur either through allopatric speciation, when a population is geographically separated from one another, or through sympatric speciation in which the two new species are not geographically separated.
Therefore, the correct answer is option B.

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