what is the term for a symbiotic relationship in which one species benefits and the other is neither harmed nor helped?
â¢ Parasitism: a relationship in which one species benefits while the other is harmed. â¢ Commensalism: a relationship in which one species benefits but the other species is neither harmed nor helped. We often represent mutualism with a â+/+â because both species receive a posi - tive benefit. Commensalism is shown as a â+/0â relationship because one species