Which of the following marine groups became extinct during the mass extinctions that mark the close of the Cretaceous?
A) Jawless fishes
B) Trilobites
C) Ammonoids
D) Crinoids
E) Gastropods

Question

Quizplus · Accepted Answer

Ammonoids, a group of marine mollusks, became extinct during the mass extinction event at the end of the Cretaceous period, approximately 66 million years ago. This event also led to the extinction of dinosaurs and many other species.

Which of the Following Marine Groups Became Extinct During the Mass