Biology (11th Edition)

Published by McGraw-Hill Education
ISBN 10: 1-25918-813-2
ISBN 13: 978-1-25918-813-8

Chapter 25 - Evolution of Development - Review Questions - Understand: 2

Answer

B.

Work Step by Step

Only a few control genes are needed to explain large changes among animals (B.), not 1000's (A.). While heterochrony or homeosis (C. and D.) may be part of the differences, they are only a part, not the whole.
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