Home Biology Ecosystem Structure and Function, Productivity and Decomposition Two different species can not live for long …
Biology Ecosystem Structure and Function, Productivity and Decomposition Single Correct MCQ
Published on: August 12, 2026

Two different species can not live for long duration in the same niche or habitat. This law is:

A
Allen's law
B
Bergman's rule
C
Competitive exclusion principal
D
Weiseman's theory

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The correct answer is:
C

Also known as Gause's Law, it states that two species competing for the exact same limited resources cannot coexist indefinitely. Eventually, the more efficient competitor will eliminate the other from that specific ecological niche.

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