Biology CLEP Prep Practice Exam

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What type of species interaction benefits both species?

  1. Mutualism

  2. Commensalism

  3. Interspecific competition

  4. Predation

The correct answer is: Mutualism

Mutualism is the only type of species interaction in which both species benefit. In commensalism, one species benefits while the other is unaffected. In interspecific competition, both species compete for limited resources and one typically benefits at the expense of the other. In predation, one species benefits by consuming the other. Therefore, A is the only option that describes a mutualistic relationship in which both species benefit.

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