- A Urea
- B Uric acid
- C Ammonia
- D Creatinine
Correct answer: B. Uric acid
Explanation: Birds and reptiles are uricotelic, excreting nitrogenous waste mainly as uric acid, which is fairly insoluble and can be excreted with minimal water loss.
Concept context
Nitrogenous waste, kidney structure, urine formation in the nephron, and hormonal regulation of excretion.
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