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Question

Jaws appeared for the first time in the class ___________. 


A
Cyclostomata
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B
Chondrichthyes
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C
Osteichthyes
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D
Amphibia
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Solution

The correct option is B Chondrichthyes
Jaws appeared for the first time in the superclass Pisces (Chondrichthyes).  
Members of the Cyclostomata do not have jaws.
Members of Osteichthyes and Amphibia have jaws.

Biology

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