Question

According to Robert May, how much is the global species diversity?

• A. 7 million
• B. 1–5 million
• C. 20–25 million
• D. 2 million

Hint:

Robert May’s estimate of 7 million species is widely cited in biodiversity studies.

Answer 1

The Correct Option is A

Step 1: Understanding global diversity estimates.
Robert May, an ecologist, estimated that the global species diversity on Earth is around 7 million species. This includes both known and unknown species.
Step 2: Analyzing options.
(A) 7 million: Correct — Matches Robert May’s estimate.
(B) 1–5 million: Incorrect — This is lower than the actual estimate.
(C) 20–25 million: Incorrect — This is a higher estimate not supported by Robert May.
(D) 2 million: Incorrect — Much lower than accepted diversity estimates.
Step 3: Conclusion.
Therefore, according to Robert May, global species diversity is approximately 7 million.