What type of symbiotic relationship is characterized by one organism benefiting while another is harmed?

• A. Mutualism
• B. Commensalism
• C. Parasitism
• D. Neutralism

Answer: (C)

In the context of symbiotic relationships, parasitism is characterized by one organism benefiting at the expense of another organism, which is harmed in the process. In this relationship, the parasite derives nutrients or benefits from the host, leading to a detrimental effect on the host's health, growth, or survival. Common examples of parasitism include ticks feeding on mammals' blood or tapeworms residing in the intestines of their hosts.

Understanding this relationship is crucial, as it highlights the dynamics of ecological interactions where one species is negatively impacted while another thrives. This contrasts with mutualism, where both organisms benefit, and commensalism, where one benefits without affecting the other. Neutralism indicates no significant impact on either organism involved. By examining these relationships, students can gain insight into the complexities of ecosystems and the interconnectedness of organismal interactions.