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← Nature & AnimalsWhich outcome occurs when deep-sea hydrothermal vent bacteria perform nitrogen fixation?
A)Ammonia becomes available to invertebrates✓
B)Seawater salt concentration decreases gradually
C)The ecosystem experiences a thermal decline
D)Inorganic carbon is converted to glucose
💡 Explanation
Nitrogen availability limits productivity in the deep sea. The bacteria employ nitrogen fixation, converting N2 to bioavailable ammonia. Therefore, invertebrates depend on fixed nitrogen, rather than other processes such as photosynthesis or upwelling, for a nitrogen source.
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