Nitrogenous waste from an unknown animal is collected and analyzed. The waste is sticky like glue or paste, and upon chemical analysis contains a molecule composed of two fused rings. The waste is most likely from which of the following animals?
A) a salmon
B) a tiger shark
C) a mouse
D) a garden snail

Question

Quizplus · Accepted Answer

The description of the waste being sticky like glue or paste and containing a molecule composed of two fused rings suggests it is uric acid, which is the nitrogenous waste primarily excreted by birds, reptiles, and some terrestrial invertebrates like snails. Therefore, a garden snail (D) is the most likely source of this type of waste.

Nitrogenous Waste from an Unknown Animal Is Collected and Analyzed