Scientists decide when an era begins and ends, due to mass extinction. About 90 percent of all organisms die in each mass extinction. ... Scientists determine when drastic changes are made by the fossil record, which shows earths past organisms that have become extinct.
Explanation:
Climate changes were most likely the cause of this phenomenon as the continents all drifted together to form Pangaea. As devastating this mass extinction was, it paved the way for new species to arise and a new era to begin.
Climate changes were most likely the cause of this phenomenon as the continents all drifted together to form Pangaea. As devastating this mass extinction was, it paved the way for new species to arise and a new era to begin.
Answers & Comments
Answer:
I think the Environment.
Scientists decide when an era begins and ends, due to mass extinction. About 90 percent of all organisms die in each mass extinction. ... Scientists determine when drastic changes are made by the fossil record, which shows earths past organisms that have become extinct.
Explanation:
Climate changes were most likely the cause of this phenomenon as the continents all drifted together to form Pangaea. As devastating this mass extinction was, it paved the way for new species to arise and a new era to begin.
Explanation:
Climate changes were most likely the cause of this phenomenon as the continents all drifted together to form Pangaea. As devastating this mass extinction was, it paved the way for new species to arise and a new era to begin.