Question

The principle of competitive exclusion states that A. two species cannot coexist in the same habitat. B. competition between two species always causes extinction or emigration of one species. C. two species that have exactly the same niche cannot coexist in a community. D. two species will stop reproducing until one species leaves the habitat.

Answer 1

The principle of competitive exclusion states that two species cannot coexist in the same habitat.

What is competitive exclusion?

The competitive exclusion principle, often known as Gause's law, is a theory in ecology that holds that two species competing for the same scarce resource cannot coexist at constant population levels. One species will eventually outnumber all others if it has even a modest edge over the others. This results in the weaker competitor's extinction or an evolutionary or behavioral shift in favor of a different ecological niche. The adage "complete competitors cannot coexist" is a paraphrasing of this idea.

Although he never created it, Georgy Gause is traditionally credited with coming up with the competitive exclusion principle. The natural selection theory put forward by Charles Darwin already incorporates the concept.

The status of the principle has fluctuated during the course of its history between

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