Protozon - Medical Science

Q1:

Which of the following is least likely to get in or on a protozoan such as a diplomonad or trichomonad?

A Flagella

B More than one nucleus

C Genes to produce a cyst form

D Rigid polysaccharide cell wall

ANS:D - Rigid polysaccharide cell wall

As I know protozoan lack cell wall. Why the answer is D?