Which of the following is an excretory product in animals?
Uric acid
Urea
Ammonia
Mammals such as humans excrete urea and ammonia while birds, reptiles and some terrestrial invertebrates produce uric acid as waste. Uricotelic organisms tend to excrete uric acid waste in the form of a white paste or powder. Hydrochloric acid is not the waste product excreted by the animal.