Chapter 25, Problem 6A

Summary Introduction

Introduction :

The Platyhelminthes contains different organism that are free and parasitic. They are divided into three classes: turbellaria, trematodes, and cestode.

Answer to Problem 6A

Correct answer :

Option (A).

Explanation of Solution

Explanation/justification for the correct answer :

Option (A) Turbellaria. The turbellaria is a class of Platyhelminthes that are free living flatworm. Hence, the correct answer is option (A).

Explanation for incorrect answer :

Option (B) Cestoda. The cestode are the parasitic tapeworms they are not free-living. Hence, it is an incorrect answer.

Option (C) Trematodes. The trematodes are the parasite, they are not free living. Hence, it is an incorrect answer.

Option (D) Nematoda. The Nematoda is a phylum of round worms. Hence, it is an incorrect answer.