Which symbiotic advantage decreases when deep-sea vent tubeworms' chemosynthetic microbiome diminishes?

💡 Explanation

Reduced microbiome activity impairs host ammonia detoxification, because oxidation via chemoautotrophy decreases ammonia levels; therefore, the tubeworm's tolerance drops, rather than photosynthetic capacity reducing (tubeworms lack chloroplasts) or oxygen uptake diversifying.

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