Short Answer
The most devastating of all mass extinction events occurred at the end of the Paleozoic Era (Permian Period)around _____ million years ago.
Correct Answer:

Verified
Correct Answer:
Verified
Related Questions
Q40: How does the early history of atmospheric
Q41: Mass extinctions in geologic history are attributed
Q42: The characteristic animals of the Cambrian Period,as
Q43: Dinosaurs included the largest land animals that
Q44: The first terrestrial vertebrates,which never became completely
Q46: Eukaryotes are recognizableas distinct from prokaryotes because
Q47: The "Cambrian Explosion" refers to _.<br>A)disappearance of
Q48: In order for mammalian life to succeed,oxygen
Q49: Which of the following is NOT a
Q50: All fossils are altered as they are