Multiple choice

Consider the following facts:

  1. Since life began on Earth, only one major mass extinction event has taken place.
  2. Dinosaurs disappeared from the face of the earth around 65 million years ago. Which of the above is/are true?

  1. Only 1

  2. Only 2

  3. Both 1 and 2

  4. Neither 1 nor 2
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Since life began on Earth, five major mass extinctions and several minor events have led to large and sudden drop in biodiversity. The most recent, the Cretaceous-Paleogene extinction event, occurred 65 million years ago and it resulted in the extinction of the dinosaurs.

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