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 23.6 - Inquiry Questions: 1

Answer

An alternative to convergence would be that the ancestor of all of the organisms shown in Fig. 23.6 had wings, and that these were lost in all lines except the birds and bats.

Work Step by Step

If convergence is not the ancestor, the birds and bats had to have a common ancestor with wings. Looking at this diagram, that would have to be at the base of the tree.
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