Question

Which of the following phylum contains the parasitic helminths?

• A. Nematoda
• B. Platyhelminthes
• C. Porifera
• D. Both A and B

Answer 1

The correct option is D Both A and B

• Phylum Nematoda usually contains parasitic roundworms while Phylum Platyhelminthes contain flatworms. Both of these types of worms are macroparasites which are visible with naked eyes in their mature stage.
• Roundworms like Ascaris, Wucheria etc are parasitic and diseases causing. Flatworms like the Liver fluke, Tapeworms are also parasitic.
• Porifera is the phylum which contains porous organism like sponges.
• Therefore the answer that parasite helminths (insects) are included in phylum Nematoda and Platyhelminthes is correct.