Major form(s) of nitrogenous wastes excreted by the animals is/ are 

Describe different types of animals on the basis of nature of nitrogenous wastes excreted by them.

In what forms are nitrogenous wastes excreted in birds, humans and fished ? Why do they do so differently ?

Birds excrete nitrogenous waste as

Birds excrete nitrogenous waste as

Birds excrete nitrogenous waste as

The waste material excreted by aquatic animals is

What are the three main types of nitrogenous wastes excreted by living beings ?