Fill in the Blanks 280-testOnline version 280-test by Farhad Key 1 intimate use interspecific lasting effects benefits Symbiosis is a general term for interactions in which two species live together in a long - term , association . In everyday life , we sometimes the term symbiosis to mean a relationship that both parties . However , in ecologist - speak , symbiosis is a broader concept and can include close , relationships with a variety of positive or negative on the participants .