A) do not have urease
B) do not excrete urea
C) cannot form uric acid
D) live in water only
Correct Answer: A
Solution :
The animals that excrete nitrogen in the form of urea are called ureotelic. In these animals (eiasmobranchs, amphibians, mammals) urea is formed in the liver from the nitrogen of amino acid and then excreted by kidney. The animals in which the nitrogenous waste is excreted in form of uric acid are called uricotelic. Uric acid is almost insoluble and excreted by kidney tubules directly into the tubular urine e.g., terrestrial reptiles and birds. Most animals living in water are ammonotelic i.e., excrete nitrogenous waste in form of ammonia.
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