Question

Which among the following does not belong to the phylum Platyhelminthes?

• A. Roundworm
• B. Planaria
• C. Fasciola
• D. Echinococcus granulosus

Answer 1

The correct option is A

Roundworm

The correct option is A.

Explanation of correct option:

1. The roundworm's body is hard, it does not belong to the Platyhelminthes phylum.
2. They are triploblastic and bilaterally symmetrical.
3. They have a pseudocoelom.
4. It has a fully functional digestive system as well as a basic neurological system.
5. It belongs to the phylum Nematoda.

Explanation of incorrect option:

Option B:

1. There are three germ layers in Planaria.
2. It has a single digestive tract entrance.
3. It is symmetrical on both sides.
4. As a result, it has a Platyhelminthes phylum characteristic.

Option C:

1. Fasciola has the ability to live without restriction.
2. It has parasitic adaptations as well.
3. The Platyhelminthes are responsible for these traits.

Option D:

1. Three segments are linked to the Echinococcus granulosus.
2. Its morphology is parasitic.
3. It is also a member of the Platyhelminthes phylum.

Final answer: Roundworm does not belong to the phylum Platyhelminthes.