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← Nature & AnimalsWhich consequence results when a soaring bird has insufficient air sac perfusion?
A)Reduced barometric pressure discrimination occurs
B)Decreased skeletal pneumaticity increases weight
C)Impaired evaporative cooling elevates temperature
D)Diminished lift generation stalls flight✓
💡 Explanation
Insufficient air sac perfusion limits oxygen to flight muscles; aerobic needs during soaring demand higher oxygen intake, hindering ATP production via cellular respiration because of impaired gas exchange. Therefore lift falls rather than effective thermoregulation or barometric perception.
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