Question

__________ are positive interactions in which two or more species benefit, while __________ are positive interactions in which one species benefits and the other species neither benefit nor are harmed. Positive interactions are believed to be more common in __________ environments because these are areas where species may be struggling to persist.

Answer 1

Mutualism and symbiosis are positive interactions in which two or more species benefit, while Commensalism are positive interactions in which one species benefits and the other species neither benefit nor are harmed. Positive interactions are believed to be more common in unfavorable environments because these are areas where species may be struggling to persist.

• Mutualism: In this relationship both partners benefit.
• Commensalism: In this relationship only one species benefits while the other is neither helped nor harmed.
• Parasitism: One organism (the parasite) gains, while the other (the host) suffers.