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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 ) All are correct
( b ) 2 is incorrect but 1 and 3 are correct
( c ) 1 is incorrect but 2 and 3 are correct
( d ) 3 is incorrect; 1 and 2 are correct
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(A) 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 Jan 6, 2014 by pady_1

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