The distribution of the percentage extinction for genera of marine animals throughout Phanerozoic shows that there has/have been __________ great mass extinction(s) over the past 500 million years that claimed 40 percent or more of these genera.

Question

Quizplus · Accepted Answer

There have been five great mass extinctions over the past 500 million years that claimed 40 percent or more of the genera of marine animals, not four. This is a factual error in the question's choices.

The Distribution of the Percentage Extinction for Genera of Marine