Three major categories of sym biosis Symbiosis living together 1. Mutualism-- both partners benefit from the association (互利共生) Example: the flagellate live in the intestine of the termite 2. Commensalism-- one partner benefits from its (偏利共生) relationship with the other(host), but the host neither benefits nor is harmed Example: remora fish associated with sharks feeds on leftover foodSymbiosis living together 1. Mutualism-- both partners benefit from the association （互利共生） Example: the flagellate live in the intestine of the termite 2. Commensalism-- one partner benefits from its (偏利共生) relationship with the other(host), but the host neither benefits nor is harmed. Example: remora fish associated with sharks feeds on leftover food Three major categories of symbiosis