Evolution
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ISBN: 9781605356051
Author: Douglas Futuyma, Mark Kirkpatrick
Publisher: SINAUER
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Chapter 21, Problem 8PDT
Summary Introduction
To describe: The geographical patterns observed in the
Introduction: Humans first appeared in Africa and about 60,000 years ago, started spreading to the rest of the places on Earth. Some species that were commensals and parasites on humans also spread across with them.
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