Question : The body of the ______ is circular in cross-section; hence, the name roundworms. They may be free-living, aquatic, terrestrial, or parasitic on plants and animals.
Option 1: Platyhelminthes
Option 2: Ctenophores
Option 3: Mollusca
Option 4: Aschelminthes
Correct Answer: Aschelminthes
Solution : The correct answer is Aschelminthes.
Another name used for roundworms is Aschelminthes. This may be free-living, or parasitic. This means they are found in nature alone or may also be present in the bodies of other organisms. One distinguished characteristic of this organism is the presence of Pseudocoelom. Their body is triploblastic and bilaterally symmetric. Males are smaller than females.
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