Multiple choice

Commensalism is a symbiotic relationship in which what occurs between the organisms?

  1. both are harmed

  2. one benefits, the other is unharmed

  3. one benefits, the other is harmed

  4. they compete

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Commensalism is defined as a relationship where one organism benefits from the interaction, while the other organism is neither helped nor harmed (unharmed). If both benefited, it would be mutualism; if one was harmed, it would be parasitism.