The single largest mass extinction in Earth's history rose above the level of a __________-percent loss of then-living marine genera over an interval of a few million years or less.

Question

Quizplus · Accepted Answer

The sentence states that the largest mass extinction in Earth's history resulted in a loss of "a __________-percent" of living marine genera. The blank space indicates that a number should be filled in, and the answer choices all provide different options for this number. The correct answer is C because it states that the mass extinction was associated with a 60-percent loss of living marine genera, which is the highest percentage listed.

The Single Largest Mass Extinction in Earth's History Rose Above