Instructions

a)What is the primary nitrogenous waste produced by animals? Why must all animals dispose of nitrogenous waste?

they secrete urea as the primary nitrogenous waste product, they are called ureotelic animals. Urea serves an important role in the metabolism of nitrogen-containing compounds by animals. … Interestingly, tadpoles excrete ammonia, but shift to urea production during metamorphosis

b)Using examples, explain why the type of nitrogenous waste excreted depends on the environment in which animals live. (12 marks)

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