What is the estimate made by Robert May about the total number of species on earth?

What is the estimate made by Robert May about the total number of species on earth?
  1. 20 to 50 million
  2. 7 million
  3. 1.5 million
  4. 10 million

Solution

Robert May, a scientifically sound estimate made by Robert May places the global species diversity at about 7 million.

Asked in: NCERT

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