Dental Admissions Test (DAT) Practice Test

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What is the term for a symbiotic relationship between two organisms in which one partner benefits, while the other is harmed?

  1. Commensalism

  2. Mutualism

  3. Parasitism

  4. Symbiosis

The correct answer is: Parasitism

Parasitism is a type of symbiotic relationship in which one organism (the parasite) benefits while the other (the host) is harmed. A parasite feeds off of its host, often resulting in negative consequences for the host such as illness or death. A is incorrect because commensalism describes a symbiotic relationship in which one organism benefits while the other is unaffected. B is incorrect because mutualism describes a symbiotic relationship in which both organisms benefit. D is incorrect because symbiosis is a general term that describes any type of close relationship between two different species. It does not specify if one organism is benefiting or being harmed.

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