Biology
NULL
Medium
Question
Marine fish can keep their internal environment hypertonic with respect to the surrounding salty water by retaining.
A
Excessive urea which will increase their internal solute concentration and prevent body shrinkage in hypertonic environment
B
Trimethyl alanine
C
Ammonia
D
Trimethylamine oxide
✓ Official correct answer
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A
Excessive urea which will increase their internal solute concentration and prevent body shrinkage in hypertonic environment
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B
Trimethyl alanine
No member explanations yet for this option.
C
Ammonia
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D
Trimethylamine oxide
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Explanation
Marine (cartilaginous) fish maintain a hypertonic internal environment relative to seawater by retaining trimethylamine oxide (TMAO) along with urea, which helps counteract the toxic effects of high urea concentrations while preventing excessive water loss.