Refer to the figure. 
What modification in jaw structure has occurred in modern jawed fishes that was not present in early jawed fishes?
A) A set of gill arches has been modified into supports for the jaws.
B) Jaws have been modified to form gill arches.
C) The anterior part of the skull has been modified to form jaws.
D) Teeth have formed from posterior gill arches.
E) Pectoral flaps have been modified into early jaws.
Correct Answer:
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