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← Nature & AnimalsWhich mechanism assists aquatic organisms in environments of increased water temperature?
A)Countercurrent exchange maintains oxygen diffusion.✓
B)Increased mucus prevents osmotic imbalance.
C)Accelerated osmosis reduces dehydration rates.
D)Active transport enhances nutrient absorption.
💡 Explanation
Higher temperatures reduce dissolved oxygen; countercurrent exchange optimizes oxygen absorption from water across gill filaments, using a diffusion gradient, because water passes adjacent to blood flow, therefore maximizes oxygen uptake rather than less efficient equilibrium.
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