First slide
Populations
Question

Which of the following interactions is detrimental (harmful) to at least one partner?  

 (i) Predation             

(ii) Mutualism  

(iii) Commensalism 

(iv) Parasitism

Easy
Solution

In both parasitism and predation only one species benefits (parasite and predator, respectively) and the interaction is detrimental to the other species (host and prey, respectively). 

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