The chief nitrognous waste in class-Chondrichthyes members is

Scales in chondrichthyes are

The body of members of class-Chondrichthyes is

Teeth in chondrichthyes are modified

What does chondrichthyes mean?

Give the distinguishing features of class Chondrichthyes.

Name the following : The chief nitrogenous waste product in the human urine and the organ which produces it.?