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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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An arctic hare’s coat color changes from white to brown each spring in response to a change in its melatonin level. This change is triggered by increasing daylength. As a result of ongoing global climate change, the arctic snow melt is occurring earlier and earlier. Explain why this change in the annual temperature pattern has increased the number of hare that are killed by predators.

Summary Introduction

To explain: The reason why the change in annual temperature pattern has increased the number of hares that are killed by predators.

Concept introduction:  Snowshoe hare are the species of hare that are found in the different regions of North America. These hares have a varied adaptation for its camouflage and they can turn the color of their fur depending on the seasons. This adaptation helps them to escape from the predators. However, these days, snowshoe hares have become a major prey for predators. This is because of the dramatical changes in the climate.

Explanation

During the winter, snowshoe hare’s fur turns into white and as the season changes from winter to summer their fur changes to rusty brown. White color fur in winter helps them to blend in winter and their rusty brown fur in summer help them to conceal with dirt and rocks. However the change in climate made snowshoe hare vulnerable. They have increased the risk of being hunted by the predator because they cannot readily camouflage with the sudden climatic changes...

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