3.Scientists are interested in classifying the many species currently living on Earth, as well as those that are no longer living. ... Some species may look very similar to each other, so it is important for scientists to establish specific criteria for what distinguishes one species from another.
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3. Scientists are interested in classifying the many species currently living on Earth, as well as those that are no longer living. ... Some species may look very similar to each other, so it is important for scientists to establish specific criteria for what distinguishes one species from another.
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