Weegy: Carboniferous is the period of the Paleozoic Era where the first amphibians evolve.
User:
During which period of the Paleozoic Era did the largest mass extinction occur?
A. Permian
B. Devonian
C. Cambrian
D. Carboniferous
Weegy: The Permian period of the Paleozoic Era, the largest mass extinction occurred.
(More)