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: 24

Answer

A newborn placental mammal is born in a relatively developed condition, having been nourished to a great extent through the placenta within the mother. Newborn marsupials, on the other hand, are born at a very undeveloped stage and continue their development within a pouch outside of the mother's body.

Work Step by Step

A newborn placental mammal is born in a relatively developed condition, having been nourished to a great extent through the placenta within the mother. Newborn marsupials, on the other hand, are born at a very undeveloped stage and continue their development within a pouch outside of the mother's body.
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