The Fossil Record Shows That the Jawed Fishes Called ____

Multiple Choice

The fossil record shows that the jawed fishes called ____, which diversified in the Devonian and Carboniferous periods but left no direct descendants, had heads covered with large, heavy, bony plates and jaws with sharp cutting edges.

A) acanthodians
B) conodonts
C) osteolepiforms
D) placoderms
E) ostracoderms