The principle of competitive exclusion was stated by :

Options

A. Mac Arthur
B. Verhulst and Pearl
C. C.Darwin
D. G.F. Gause

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the origin of the principle of competitive exclusion, which is a concept in ecology that explains the outcome of competition between two species that share the same niche.

2. **Identifying the Options**: The options provided are MacArthur, Verhulst & Perl, Darwin, and G.F. Gauss.

3. **Researching the Principle**: The principle of competitive exclusion states that two species competing for the same resources cannot coexist if other ecological factors are constant. This principle suggests that one species will outcompete the other, leading to the extinction of the less competitive species.

4. **Recalling the Correct Scientist**: The principle of competitive exclusion was formulated by G.F. Gauss. He stated that two closely related species competing for the same resources cannot coexist indefinitely.

5. **Conclusion**: Based on the information gathered, the correct answer to the question is G.F. Gauss (option D).

**Final Answer**: The principle of competitive exclusion was stated by G.F. Gauss.

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