Weegy: your answer is fossil of fishes User: The deadliest of all mass extinctions, which killed 95% of all living organisms, was the _____.
Weegy: Permian-Triassic User: The principle of uniformitarianism states that _____.
User: Events or processes that have been suggested as causes of mass extinctions include _____.
dramatic changes in levels of atmospheric carbon dioxide
transitions between geologic ... (More)