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: 23

Answer

The placenta allows embryos to stay inside the mother for longer periods of time. This structure allows nutrients from the mother to nourish the embryo while waste products can be transferred from the embryo to the mother for disposal.

Work Step by Step

The placenta allows embryos to stay inside the mother for longer periods of time. This structure allows nutrients from the mother to nourish the embryo while waste products can be transferred from the embryo to the mother for disposal.
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