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Regarding Class – Cyclostomata : 1. They have an elongated body 2. They bear 6-15 pairs of gill slits. 3. Cyclostomes have a circular mouth without jaws Regarding 1,2 and 3:

( a ) 1 is incorrect but 2 and 3 are correct
( b ) 3 is incorrect; 1 and 2 are correct
( c ) 2 is incorrect but 1 and 3 are correct
( d ) All are correct
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(D) is the right answer.

Class – Cyclostomata : They have an elongated body bearing 6-15 pairs of gill slits for respiration. Cyclostomes have a sucking and circular mouth without jaws
answered Mar 20, 2014 by pady_1
 

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