Multiple choice

Which statement is true of extinction?

  1. It is occurring all the time.

  2. It happens at a constant rate.

  3. It occurs less frequently over time.

  4. It happens only during mass extinction events.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Extinction is a natural, ongoing evolutionary process known as background extinction, which occurs continuously throughout Earth's history. It does not happen at a perfectly constant rate, nor is it limited only to mass extinction events.

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