Question

Mammal excretes nitrogenous wastes in the form of:

• A. Ammonia
• B. Amino acids
• C. Urea
• D. Uric acid

Answer 1

The correct option is C Urea

• The process of eliminating the metabolic and toxic substances such as nitrogenous wastes from the body of living organisms is called excretion.
• Nitrogenous waste is produced during the degradation of proteins due to the chemical transformations of the amine group of amino acid molecules.
• Nitrogenous wastes excreted by living organisms include ammonia, uric acid, and urea.
• Mammals such as humans excrete urea, while birds, reptiles, and some terrestrial invertebrates produce uric acid as waste.

So, the correct answer is option C.