Most toxic nitrogenous waste material is

least toxic nitrogeneous waste material is

leat toxic nitrogeneous waste material is

What is the exogenous source of nitrogenous waste material ?

A bird excrates nitrogenous waste materials in the form of?

A bird excrete nitrogenous waste materials in the form

Least toxic nitrogenous waste is -

Name the 3 common nitrogenous waste materials in vertebrates. Which of these is most toxic and which least toxic ?

Which of the following is the most toxic nitrogenous waste?