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Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332

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BuyFindarrow_forward

Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332
Textbook Problem
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Compared to closely related species that live in warmer areas, cold dwellers tend to have larger body size and smaller appendages. Think about heat transfers between animals and the habitat, then explain why smaller appendages and larger body size are advantageous in very cold climates.

Summary Introduction

To explain: The reason why smaller appendages and larger body sizes are advantageous in very cold climates.

Concept introduction: The ratio of body surface to volume is an important characteristic for amount of heat transfer between animals and their habitats. Larger animals have a lower ratio of body surface to volume and radiate less heat. Smaller animals have a higher ratio of body surface to volume and radiate more heat.

Explanation

The higher ratio of body surface to volume facilitates more heat transfer in smaller animals that live in warmer areas. The presence of larger appendages in these animals helps in more heat loss. In this way, these animals sustain their life in warmer places and keep their body cool...

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