General Science • BiologyMedium
What is the primary nitrogenous waste excreted by terrestrial mammals and adult amphibians?
A. Ammonia
B. Urea✓ Correct Answer
C. Uric acid
D. Creatinine
💡 Solution & Explanation
Terrestrial mammals and adult amphibians are classified as ureotelic organisms that convert toxic ammonia into urea within the liver for safe excretion through urine. Aquatic animals excrete highly toxic ammonia directly into water, while birds and reptiles excrete uric acid to conserve bodily water. Questions regarding nitrogenous waste excretion patterns frequently appear in competitive biology evaluations.
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