Ciliates differ from all other protozoans in

A using pseudopodia for capturing prey

B having a contractile vacuole for removing excess water

C using flagella for locomotion

D having two types of nuclei

The answer is D.

Solution

Ciliates have a macronucleus and a micronucleus.

Ciliates differ from other protozoans in having two types of nuclei, e.g. $Paramoecium$ has a macronucleus and a micronucleus.

Concept ciliates-dimorphic-nuclei

117 questions from this chapter have appeared across 26 exam years.