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← Nature & AnimalsWhich outcome sharply declines amphibian egg oxygen uptake during pond eutrophication?
A)Reduced oxygen gradient across membrane✓
B)Increased eggshell permeability limitations
C)Decreased hemoglobin concentration availability
D)Elevated metabolic oxygen consumption rate
💡 Explanation
During eutrophication, increased algal respiration depletes oxygen near eggs; decreasing the oxygen gradient, which relies on high oxygen differential in water near egg via convection, reducing diffusion. Therefore, a diminished gradient lowers uptake, rather than increased egg limitations, hemoglobin defects, or faster consumption, unrelated to eutrophication impact.
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