11
QuizMultiple Choice

The Earth's History — Test

Question 11 • Earth and Space Science

What is a plausible reason why evolutionary radiations tend to follow mass extinctions?

Answer
A
Surviving organisms have access to more resources than were available to them before the extinction event.
B
Mass extinctions wipe out all life except the simplest forms, so evolution must start over again to generate new life forms.
C
Extinction events cause improvements in climate that make the planet more suitable for a wider variety of life forms.
D
Organisms that become extinct are not complex or diverse, and organisms that survive extinction events are.
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