Question

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

• A. 1.5 million
• B. 20 million
• C. 50 million
• D. 7 million

Answer 1

The Correct Option is D

To answer the question about global species diversity according to Robert May, we need to consider his research and estimates regarding the biodiversity on Earth.

Step-by-step Explanation:

1. Understanding Global Species Diversity: Robert May, a renowned ecologist and theoretical biologist, has made significant contributions to understanding biodiversity. He suggested estimates for the total number of species existing on Earth.

2. Global Species Estimate by Robert May: Robert May estimated that the global species diversity is about 7 million species. This estimate includes all forms of life, such as plants, animals, fungi, and microorganisms.

3. Evaluating the Options:

   • 1.5 million: This number is often referenced in terms of the number of species scientifically recorded and classified, not the total estimation of all species.
   • 20 million and 50 million: These figures exceed the estimates made by Robert May. While some biodiversity researchers might consider higher numbers possible due to undiscovered species, May's estimate is more conservative.
   • 7 million: This option aligns best with Robert May's estimation for the total species diversity, making it the correct answer.

Conclusion: Based on the above explanation, the correct answer is 7 million, which is the estimate proposed by Robert May for the global species diversity.