WAEC - Biology (1994 - No. 20)
Which of the following performs the same function as the contractile vacuole of a unicellular organism?
Kidney
Alimentary canal
Liver
Pancreas
Bladder
Explanation
The function of a contractile vacuole, which is to regulate osmotic pressure and remove excess water, is analogous to the function of the kidneys, which filter blood and regulate fluid balance, not the liver.