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The Excretory system — Biology STD 10 — Question

ICSE BoardEnglish MediumSTD 10BiologyThe Excretory system1 Mark
MCQ
What is the chief nitrogenous waste in mammals?
  • A
    amino acid
  • B
    ammonia
  • C
    uric acid
  • ✓
    urea
✓

Answer

Correct option: D.
urea
(d) urea
Explanation:
Urea is the primary form of nitrogenous waste excreted by mammals, synthesised in the liver from ammonia and then excreted by the kidneys, optimising water conservation and reducing toxicity compared to ammonia or uric acid.

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