Which term describes a relationship that is harmful to one or both organisms?

Which term describes a relationship that is harmful to one or both organisms?

• A. Asymbiotic
• B. Symbiotic
• C. Mutualism
• D. Parasitism

Answer: (A)

Parasitism is an interaction where one organism benefits at the expense of the other. In this relationship, the parasite gains nutrients or a habitat, while the host is harmed, which fits the description of a relationship harmful to one or both parties. Asymbiotic means no close interaction at all, so it wouldn’t describe a harmful relationship. Symbiotic refers to any close living association, but it includes cases where both partners benefit or one benefits without harming the other. Mutualism is a type of symbiosis where both organisms benefit. Therefore, the term that best fits a harmful relationship is parasitism.

Parasitism is an interaction where one organism benefits at the expense of the other. In this relationship, the parasite gains nutrients or a habitat, while the host is harmed, which fits the description of a relationship harmful to one or both parties.

Asymbiotic means no close interaction at all, so it wouldn’t describe a harmful relationship. Symbiotic refers to any close living association, but it includes cases where both partners benefit or one benefits without harming the other. Mutualism is a type of symbiosis where both organisms benefit. Therefore, the term that best fits a harmful relationship is parasitism.