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NEETBotanyBiodiversity and its Conservation

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

Options

  1. A20 to 50 million
  2. B7 million
  3. C1.5 million
  4. D10 million

Correct answer

B. 7 million

Step-by-step solution

Considering that an overwhelmingly large proportion of the species waiting to be discovered are in the tropics, biologists make a statistical comparison of the temperate-tropical species richness of an exhaustively studied group of insects and extrapolate this ratio to other groups of animals and plants to come up with a gross estimate of the total number of species on earth. Some extreme estimates range from 20 to 50 million, but a more conservative and scientifically sound estimate made by Robert May places the g

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