Feathers<span> vary considerably in structure and </span>function<span>. </span>Contour feathers<span> form most of the surface of the bird, streamlining it for flight and often waterproofing it. The basal portion may be downy and thus act as insulation.
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In the absence of the Coriolis Effect, the temperature of the tropics will be much higher than the current temperature.
Answer:
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