Biology 2010 Student Edition

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

Chapter 26, Animal Evolution and Diversity - Assessment - 26.1 Invertebrate Evolution and Diversity - Understand Key Concepts/Think Critically - Page 776: 5

Answer

About 10 to 15 million years ago, animals evolved specialized cells, tissues, and organs; body symmetry; appendages; a front and back side; segmentation; hard body parts; and antennae.

Work Step by Step

About 10 to 15 million years ago, animals evolved specialized cells, tissues, and organs; body symmetry; appendages; a front and back side; segmentation; hard body parts; and antennae.
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.

GradeSaver will pay $15 for your literature essays
GradeSaver will pay $25 for your college application essays
GradeSaver will pay $50 for your graduate school essays – Law, Business, or Medical
GradeSaver will pay $10 for your Community Note contributions
GradeSaver will pay $500 for your Textbook Answer contributions