Mutualism | Parasitism | Commensalism |
It is a positive interaction. | It is a negative interaction. | It is a positive interaction. |
Both the involved species are benefited. | One species is benefited other is harmed. | One species is benefited other is unaffected. |
Example: pollination by insects, Rhizobium+ legumes. | Example: Cuscuta and host plant, Ascaris and host organism. | Example: Woody climbers taking support of trees, Jackals following lions for food. |