Ans. A cilium performs various functions:
- They act as the primary locomotory organs of numerous protozoans.
- They also act as sensory organs.
- Organisms may use it to sweep away certain unwanted substances and other disease-causing organisms.
- They also play an essential role in the cell cycle and help in food intake.
- They play an important role in organ development.
- Non-motile cilium possesses a chemoreceptor on the surface.