Extinction is a process that can depend on a variety of ecological, geographical, and physiological variables. These variables affect different species of organisms in different ways, and should, therefore, yield a random pattern of extinctions.
However, the fossil record shows that extinction occurs in a surprisingly definite pattern, with many species vanishing at the same time.
Which of the following, if true, forms the best basis for at least a partial explanation of the patterned extinctions revealed by the fossil record?

Question

Examsnet · Accepted Answer

Correct Answer is :  Major episodes of extinction can result from widespread environmental disturbances that affect numerous different species.

GMAT Verbal Reasoning Practice Test 4