Two different species cannot live for long duration in the same niche or habitat. This law is called

Options

A. Allen's low
B. Gloger rule
C. Competitive exclusion principle
D. Weisman's theory

Answer

**Step-by-Step Solution:**

1. **Understanding the Statement**: The question states that two different species cannot live for a long duration in the same niche or habitat. This implies that there is a limitation on how two species can share resources in a given environment.

2. **Identifying the Concept of Competition**: In ecology, competition occurs when two species vie for the same resources (such as food, space, or light). This competition can be detrimental to both species as it limits their ability to thrive.

3. **Explaining the Competitive Exclusion Principle**: The principle states that if two species compete for the same resources, one species will be more efficient in utilizing those resources. Over time, this leads to the exclusion of the less efficient species from that niche.

4. **Recognizing the Implications of the Principle**: According to the competitive exclusion principle, two closely related species cannot coexist indefinitely in the same niche. Eventually, one species will outcompete the other, leading to the elimination of the less competitive species.

5. **Conclusion**: The law that describes this phenomenon is known as the "Competitive Exclusion Principle," which is also referred to as Gauss's Exclusion Principle, named after the ecologist who formulated it.

6. **Final Answer**: The correct answer to the question is **Option C: Competitive Exclusion Principle**.

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