According to Robert May,the total global species diversity is about:

  • A
    $7$ million
  • B
    $7$ billion
  • C
    $20$ to $50$ million
  • D
    $1.5$ million

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As estimated by Robert May, what is the total number of species present on Earth?

What is the estimated total number of species on Earth?

Based on the given pie diagram,identify the correct expression with relation to the number of various groups of organisms.

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