Biology 2010 Student Edition

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

Chapter 25, Introduction to Animals - Assessment - 25.1 What is an Animal? - Understand Key Concepts/Think Critically - Page 746: 2

Answer

a.

Work Step by Step

Option b. is incorrect. Not all chordates have four legs. Option c. is incorrect. Invertebrates have circulatory systems. Option d. is incorrect. Invertebrates such as insects have exoskeletons. Option a. is correct. All chordates have a notochord at some point in their lives.
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