Iterative evolution is the repeated evolution of similar or parallel structures from the same ancestor but at different times. Scientists find fossil evidence that on 2 separate occasions thousands of years apart, one species of bird flew over and colonized an atoll and evolved to be flightless.

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Iterative evolution is the repeated evolution of similar or parallel structures from the same ancestor but at different times. Scientists find fossil evidence that on 2 separate occasions thousands of years apart, one species of bird flew over and colonized an atoll and evolved to be flightless.