How does a bony fish mainly get rid of its ammonia?
AThrough liver as bile pigments
BThrough skin as uric acid paste
CThrough kidneys as urea
DAcross gills as ammonium ions
Answer & Solution
Correct answer: D. Across gills as ammonium ions
Being very soluble, ammonia diffuses out across gill surfaces as ammonium ions, with little role for kidneys.
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