has part has part realizes characteristic of inheres in ectosymbiosis ectosymbiotic commensalism An ectosymbiosis that results in benefit to one participating organism and neither harm nor benefit to the other participating organisms. William R. Hogan Matthew Diller An ectosymbiosis that results in benefit to one participating organism and neither harm nor benefit to the other participating organisms. ectocommensalism bodily benefit organism homeostasis