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Biodiversity today is the result of how many billion years of evolution?
A2.5 to 3.5
B1.5 to 2.5
C4.5 to 5.5
D6.5 to 7.5
Answer & Solution
Correct answer: A. 2.5 to 3.5
1. Before humans the earth held more biodiversity than ever.
2. It took 2.5 to 3.5 billion years.
3. Extinction has sped up since humans emerged.
_Source: NCERT Class 11 Fundamentals of Physical Geography, Chapter 16, Biodiversity and Conservation._
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