Read the following features and identify the organism of protista:
(a) It is aquatic, actively moving organism.
(b) It has thousands of cilia.
(c) It has a cavity (gullet) that opens to the outside of the cell surface.
Ciliated protozoans are aquatic, actively moving organisms because of the presence of thousands of cilia. They have a cavity (gullet) that opens to the outside of the cell surface. The coordinated movement of rows of cilia cause the water laden with food to be steered into the gullet. Example: Paramoecium