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mysttrr mysttrr
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Posts: 723
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6 years ago
When a bird ruffles its feathers in response to heat stress it
 a. permits convective currents to carry heat away from the body surface.
  b. permits exchange of air with 100 humidity for air with lower humidity, enabling evaporative cooling to occur.
  c. both of these.
  d. neither of these.
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6 years ago
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