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How do new species form?

A new species can form when a group of individuals remain isolated from the rest of it species long enough to evolve different traits that prevent reproduction.

_______ is a pattern of new species form and over very long periods of time.

Gradualism

What evidence in the fossil record support gradualism?

Intermediate forms of organisms showing gradual changes.

______ occurs when some members of a species become cut off.

Isolation

The cow and the dog are separate species, unable to _______ with each other.

Mate

_______ is a pattern of new species evolving during short periods of rapid change.

Punctuated Equilibrium

What are some examples of natural barriers that can separate group members?

River, Volcano, Mountain, range, Ocean


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