Evolutionary history includes mass extinctions that are characterized by the sudden disappearance of a wide variety of species. What is another important consequence of mass extinctions?
a. Mass extinctions create climate changes that lead to further extinctions.
b. The number of groups of organisms tends to drop following a mass extinction and then levels off.
c. Species remaining after a mass extinction are poorly adapted to their environment.
d. Following a mass extinction, there is always a burst of life's diversity.
c. Mass extinctions are always followed by a catastrophic event.
Answer: d. Following a mass extinction, there is always a burst of life's diversity.
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