Campbell Biology (10th Edition)
Campbell Biology (10th Edition)
10th Edition
ISBN: 9780321775658
Author: Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson
Publisher: PEARSON
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Chapter 34.7, Problem 3CC

WHAT IF? Ø Some genetic studies suggest that the most recent common ancestor of Homo sapiens that lived outside of Africa left Africa about 50,000 years ago. Compare this date with the dates of fossils given in the text. Can both the genetic results and the dates ascribed to the fossils be correct? Explain.

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Scientists know that the last common ancestor between chimpanzees and humans lived 5-7 million years ago because: O It lived shortly after the disappearance of the dinosaurs at 10 million years ago. O The carliest hominins were found in woodlands The time the last common ancestor existed can be calculated by comparing chimpanzee and human DNA and using a "molecular clock" O Chimpanze fossils first appear in the fossil record 10 million years ago
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Evolution in Humans: 1) describe several techniques that paleontologists today use to establish fossil age 2) describe how tracking changes in DNA sequence among related organisms can be used to create a migration map

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Campbell Biology (10th Edition)

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