Question

select all that apply
select all of the following that went extinct at the end of the mesozoic era about 65 million years ago.
pterosaurs
plesiosaurs
mammals
ammonites
amphibians
nonavian dinosaurs

Explanation:

At the end - Cretaceous mass - extinction (end of the Mesozoic era about 65 million years ago), non - avian dinosaurs, pterosaurs, plesiosaurs, and ammonites went extinct. Mammals and amphibians survived this mass - extinction event.

Answer:

pterosaurs, plesiosaurs, ammonites, nonavian dinosaurs