In ciliated protozoans, what directs water laden with food into the gullet?
Ciliated protozoans possess numerous cilia. The coordinated movement of rows of cilia steers water carrying food into a cavity called the gullet. Paramoecium is an example.
Ref: NCERT Class 11 Biology Chapter 2: Biological Classification Protista - Euglenoids Slime Moulds Protozoans