Question

Complete the sentence.

Commensalism is best defined as ____________.
Select one:

a relationship in which both species benefit from the relationship

a relationship in which only one organism benefits and the other is neither helped nor harmed

an organism killing another organism for food

a relationship in which one organism benefits by living in or on another and the other organism is harmed

Answer 1

a relationship between two organisms of different species. In a commensal relationship, one organism benefits while the other is generally unaffected.