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: 2


To test for this, one could look at the fossil record for the ancestor, check DNA sequences related to wing formation to see if they match those in an outgroup and are similar in birds and bats, showing their retention from a shared ancestor.

Work Step by Step

To get to this answer, try to think of what evidence could link these two winged creatures to a winged common ancestor. Morphology and DNA are two obvious choices.
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