Campbell Biology (10th Edition)

Published by Pearson
ISBN 10: 0321775651
ISBN 13: 978-0-32177-565-8

Chapter 17 - Test Your Understanding - Level 3 - Synthesis/Evaluation: 13

Answer

The siamese cat has darker pigmentation, due to some proteins functioning differently at lower temperature, because the extremities which are dark have a lower temperature. They are farther from the warmer body core and have long, thin shapes which readily lose heat/have a lower temperature.

Work Step by Step

The key is to use the hint about body temperature and why the darker parts of the body would be cooler/end up darker. Think about walking on a cool day-- what gets cold first, hands, nose, and feet or body core?
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