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← Nature & AnimalsWhich outcome impairs a fish's buoyant maintenance while swimming?
A)Reduced swim bladder gas secretion✓
B)Increased erythrocyte oxygen affinity
C)Enhanced lamellar water diffusion
D)Decreased opercular pumping rate
💡 Explanation
Insufficient gas secretion into the swim bladder reduces buoyancy because gas pressure declines, thus decreasing the upward force; therefore, the fish exerts more energy to maintain position rather than adjusting density, as buoyancy declines.
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