NEET 2020 · BiologyNumber of speciesPrevious Year Question
According to Robert May, the global species diversity is about (NEET 2020)
Answer: (B) 7 million. Answer: (B) 7 million (answer per official NEET key).
- A.50 million
- B.7 million✓
- C.1.5 million
- D.20 million
Correct Answer
(B) 7 million
Solution & Explanation
Answer: (B) 7 million (answer per official NEET key). Solution: A conservative, scientifically sound estimate by Robert May places global species diversity at about 7 million. The 1.5 million figure (option C) is the number of species already described per IUCN (2004), and 20-50 million (options A/D) are the extreme, less reliable estimates - all are distractors. NCERT: NCERT Class XII Biology, Ch 13 Biodiversity and Conservation, p.217, lines 45-47: "a more conservative and scientifically sound estimate made by Robert May places the global species diversity at about 7 million."
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