Which group of organisms was the first to exhibit jaws?

Question

Quizplus · Accepted Answer

Gnathostomes, or jawed vertebrates, were the first group of organisms to exhibit jaws. This allowed them to more effectively capture and manipulate their food, leading to their diversification and success in the evolution of vertebrates. Ray-finned fishes are a type of gnathostome, but not the first to exhibit jaws. Reptiles and birds also have jaws but evolved later than gnathostomes. Echinoderms are not vertebrates and do not have jaws.

Which Group of Organisms Was the First to Exhibit Jaws