Contractile vacuoles in freshwater protozoans function to
A)remove excess water.
B)remove the nitrogenous by-products of metabolism.
C)capture prey.
D)increase the efficiency of movement.
E)destroy infectious bacteria.

Question

Quizplus · Accepted Answer

Contractile vacuoles are specialized organelles found in freshwater protozoans that function to remove excess water from the cell. Freshwater is hypotonic to the cytoplasm of the protozoan and water will tend to enter the cell by osmosis. The contractile vacuole collects water and then expels it from the cell, preventing it from bursting.

Contractile Vacuoles in Freshwater Protozoans Function to