Campbell Biology (11th Edition)

Published by Pearson
ISBN 10: 0-13409-341-0
ISBN 13: 978-0-13409-341-3

Chapter 2 - Test Your Understanding - Level 3 - Synthesis/Evaluation - Page 43: 10


It is easy to account for the similarities in elements found in organisms. Macromolecules are composed of the same elements regardless of the organism they're in. For example, DNA contain a various number of elements. Because all organisms have the same nucleotides, all will have the same elements.

Work Step by Step

All life evolved from a common ancestor. All organisms have similar needs, such as for energy and genetic coding.
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