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How many mass extinctions have occurred since the origin and diversification of life on Earth?

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in Biology – Class 12 by (271k points)
How many mass extinctions have occurred since the origin and diversification of life on Earth?

(a) 2

(b) 8

(c) 3

(d) 5

The question was posed to me in semester exam.

My doubt stems from Loss of Biodiversity topic in division Biodiversity and Conservation of Biology – Class 12

1 Answer

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Best answer
Right answer is (d) 5

The best explanation: The Earth went through five episodes of mass extinction of species since the origin and diversification of life (>3 billion years). Every mass extinction has led to more than 80% loss of species on Earth.

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