When birds migrate south for the winter, they may fly hundreds or even thousands of kilometers in
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When birds migrate south for the winter, they may fly hundreds or even thousands of kilometers in a relatively short period of time. Why do birds put on a layer of fat before their annual migration? Why don’t they store this energy in the form of carbohydrate?
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Related Book For
Conceptual Integrated Science
ISBN: 9780321818508
2nd Edition
Authors: Paul G Hewitt, Suzanne A Lyons
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