Which of the following group of animals is ureotelic?

(a) Many terrestrial amphibians

(b) Mammals

(c) Marine fishes

Many terrestrial amphibians, mammals, and marine fishes are ureotelic. Ureotelic animals excrete waste nitrogen primarily in the form of urea. While the efficiency and specifics of urea excretion might vary between these groups due to their different habitats and physiological adaptations, they all utilise the urea pathway to eliminate waste nitrogen from their bodies.