Biology (11th Edition)

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

Chapter 53 - Animal Development - Review Questions - Apply: 5

Answer

B.

Work Step by Step

Exposure to chemicals such as drugs or alcohol have the greatest effect when the greatest amount of pattern formation is happening during development, the first trimester (B).
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