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Ciliates differ from all other protozoans in

using pseudopodia for capturing prey
having a contractile vacuole for removing excess water
using flagella for locomotion
having two types of nuclei
Explanation:

Ciliates differs from other protozoans in having two types of nuclei. eg. Paramoecium have two types of nuclei i.e. macronucleus & micronucleus.
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