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1. Vertebrata includes Divisions Agnatha and Gnathostomata. 2. Gnathostomata includes Super Classes Pisces and Tetrapoda. 3. Divisions Agnatha includes Class Cyclostomata. Regarding 1,2 and 3:

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

Vertebrata includes Divisions Agnatha (lacks jaw) and Gnathostomata (bears jaw). Gnathostomata (bears jaw) includes Super Classes Pisces (bear fins) and Tetrapoda (bear limbs). Divisions Agnatha (lacks jaw) includes Class Cyclostomata
answered Mar 20, 2014 by pady_1

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