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GK QUESTION#3906

The body of the ______ is circular in cross-section, hence the name roundworms. They may be free living, aquatic and terrestrial or parasitic in plants and animals.

  1. APlatyhelminthes
  2. BCtenophores
  3. CMollusca
  4. DAschelminthesCorrect answer
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Answer

D. Aschelminthes

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Explanation

Aschelminthes is the traditional grouping intended here for roundworms, now usually treated as Nematoda. Their cylindrical bodies are circular in cross-section; species include free-living and parasitic forms.

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