Question

Classes of platyhelminthes are

• A. Turbellaria
• B. Trematoda
• C. Cestoda
• D. All of the above

Answer 1

Answer: (D)

All of the above

• Platyhelminthes is comprised of three classes, Turbellaria, Trematoda and Cestoda.
• Turbellaria includes all the sub-groups that are not exclusively parasitic i.e., some of them in this class are free-living like Pseudoceros dimidiatus.
• Trematoda is a class that includes two groups of parasitic worms (flukes).
• Cestoda is a class of parasitic flatworms (tapeworms).

Therefore, the correct answer is option D.