Biology 2010 Student Edition

Published by Prentice Hall
ISBN 10: 9780133669510
ISBN 13: 978-0-13366-951-0

Chapter 28, Animal Systems II - Assessment - 28.3 Reproduction - Understand Key Concepts/Think Critically - Page 835: 20

Answer

b.

Work Step by Step

Option a. is incorrect. Seals are placental mammals. Option c. is incorrect. Carnivores, which include cats and wolves, are placental mammals. Option d. is incorrect. Primates such as monkeys and humans are placental mammals. Option b. is correct. Marsupials are a type of mammal where the young are born immaturely and continue their development in pouches outside the mother's body.
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