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Class – Chondrichthyes : 1. Teeth are modified placoid scales 2. Teeth are directed forwards. 3. Their jaws are very powerful. 4. These animals are predaceous. Regarding 1,2,3 and 4:

( a ) 1 and 3 are correct but 2 and 4 are incorrect
( b ) 2 is incorrect; 1,3 and 4 are correct
( c ) 3 is incorrect; 1,2 and 4 are correct
( d ) 1 and 3 are incorrect but 2 and 4 are correct

1 Answer

(B) is the right answer.

Class – Chondrichthyes : Teeth are modified placoid scales which are backwardly directed. Their jaws are very powerful. These animals are predaceous.
answered Mar 20, 2014 by pady_1
 

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