Commensalism is:
Correct answer: C. When weaker partner is benefited and the stronger is unharmed
- A. When both partners are harmed
- B. When both partners are benefited
- C. When weaker partner is benefited and the stronger is unharmed
- D. None of these
Explanation
Commensalism is a +/0 relationship: one organism benefits while the other is neither helped nor harmed. This distinguishes it from mutualism, where both partners benefit, and parasitism, where one is harmed.
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