Biology (11th Edition)

Published by McGraw-Hill Education
ISBN 10: 1-25918-813-2
ISBN 13: 978-1-25918-813-8

Chapter 23 - Systematics, Phylogenies, and Comparative Biology - Figure 23.15 - Inquiry Question: 1

Answer

One could test for signs of the reversion in part a by looking at features such as gene sequences. If gene sequences were more similar to proposed + relatives near each - taxon, that would indicate the multiple reversions had happened.

Work Step by Step

The key is to imagine what would show that the reversion had actually happened. There should be signs of being more similar to nearby - taxa (version a) rather than more similarity to the ancestral taxon (b).
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