Which effect results when migratory birds extensively use thermal lift?

💡 Explanation

Thermal lift causes decreased energy expenditure because soaring flight allows conservation via minimized flapping, rather than increased flapping; barbs & barbules on lightweight feathers leverage lift & control; therefore lower muscle actuation, rather than excess feather degration under aerodynamic forces because no more flapping, during high-altitude ascent.

• Which outcome occurs when reindeer calves experience vasodilation during sub-zero temperatures?
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• Which outcome occurs in arctic mammals when radiation exposure causes overheating?
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