Jaws appeared for the first time in the class ___________.

Cyclostomata

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Chondrichthyes

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Osteichthyes

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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.

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Class Chondrichthyes

Standard XIII Biology

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Jaws appeared for the first time in the class ___________.

The correct option is B ChondrichthyesJaws 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.

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.