Question

Animals belonging to phylum Platyhelminthes are also called flat worms because

• A. Their head is flat.
• B. They have dorsoventrally compressed body.
• C. They creep over the surface.
• D. The alimentary canal is flattened.

Answer 1

The correct option is B They have dorsoventrally compressed body.

Platyhelminthes are a group of invertebrates that are also called as flatworms because their bodies are dorsoventrally flattened. So they appear like ribbon-like creatures. They are relatively simple, bilateral, unsegmented and soft-bodied invertebrates. So, the correct answer is 'They have dorsoventrally compressed body'.