In which of the following is the clitellum ab | vedclass

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(A) The $Clitellum$ is a thick,glandular,and non-segmented section of the body wall near the head in earthworms and leeches.It is a characteristic fea

Vedclass · Accepted Answer

Polychaeta

Vedclass · Answer

(A) The $Clitellum$ is a thick,glandular,and non-segmented section of the body wall near the head in earthworms and leeches.It is a characteristic feature of the class $Clitellata$,which includes the subclasses $Oligochaeta$ (e.g.,earthworms) and $Hirudinea$ (e.g.,leeches).In contrast,the class $Polychaeta$ (e.g.,$Nereis$) lacks a $Clitellum$ entirely.Therefore,the correct answer is $A$.

In which of the following is the clitellum absent?

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