Which one of the following statements is not correct about cyclostomes? (A) Cyclostomes have an ...

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Which one of the following statements is not correct about cyclostomes?
(A) Cyclostomes have an elongated body bearing 6-15 pairs of gill slit for respiration
(B) Cyclostomes have a circular mouth with jaws and teeth
(C) The body of cyclostomes is devoid of scales and paired fins
(D) In cyclostomes, circulation is of closed type
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