Question

Which of the following does not have an excreatary system? Catla. Myxine. Asterias. CarchaRodon

Answer 1

Answer:

• Excretory organs are lacking in starfish (Asteria). Excretory material includes ammonium compounds, urea and creatine, which are released to the outside either through dermal branchiae or engulfed by amoebocytes. Water vascular system also serves as excretory organ.