Question

Cestoda are distinguished from other flatworms by the absence of :

• A. digestive system
• B. nervous system
• C. excretory system
• D. reproductive system

Answer 1

The correct option is B nervous system

Cestoda is a class of parasitic worms in the phylum platyhelminthes. They are the group of flatworms. Cestoda are distinguished from other flatworms by the absence of nervous system. Like all other flatworms cestoda also have digestive system, excretory system and reproductive system but cestoda lack sensory organs and nervous tissue. Sensory organs are less developed in cestoda.