Aproposed explanation in evolutionary biology stating that species are generally stable over long periods of time. occasionally there are rapid changes that affect some species which can quickly result in a new species.

For the answer to the question above, a proposed explanation in evolutionary biology stating that species are generally stable over long periods of time is called "punctuated equilibrium" and occasionally there are rapid changes that affect some species which can quickly result in a new species.

The answer is "punctuated equilibrium"

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