Biology: The Unity and Diversity of Life (14th Edition)

Published by Brooks/Cole Publishing Co.
ISBN 10: 1305073959
ISBN 13: 978-1-30507-395-1

Chapter 25 - Self-Quiz - Page 433: 9

Answer

c. feathers

Work Step by Step

The cloaca is present in amphibians, reptiles, many fish, and some mammals. Both birds and mammals have four-chambered hearts. Some reptiles, birds, dinosaurs, and even mammals have amniote eggs. Only feathers are found uniquely in birds.
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