23
QuizMultiple Choice

Population Genetics — Unit test

Question 23 • 112 CCHS Environmental Science

Which of the following is not a possible long-term consequence of two organisms occupying the same niche?

Answer
A
Local extinction
B
Adaptation
C
Migration
D
Coexistence

Explanation

The competitive exclusion principle says that two organisms using the same niche cannot stably coexist indefinitely because they compete for the same resources. Over time, one may cause the other’s local extinction, move away, or adapt to use resources differently. Therefore, “Coexistence” is not a possible long-term consequence of occupying the same niche.

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