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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Hey there,
Your question states: <span>A student made a model of isostasy by placing a block of wood in a beaker of water how can a student demonstrate isostaic rebound using her model?
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By "</span><span>Press the block down and let go" and that would demonstrate it well.
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Passing genes to GENErations
You would be studying the links between stress and illness.
