Answer
An evolution tree shows the common ancestry of organisms by looking at their common DNA.
Work Step by Step
They imply that all living organisms come from one original living species. This species is likely of the domain of archaea.
Biology 2010 Student Edition
by Miller, Kenneth R.; Levine, Joseph S.
Published by
Prentice Hall
ISBN 10:
9780133669510
ISBN 13:
978-0-13366-951-0
Chapter 16, Darwin's Theory of Evolution - 16.3 - Darwin Presents His Case - 16.3 Assessment - Page 464: 2b
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