symbiotic relationship traffic sign on blue sky

symbiotic relationship traffic sign blue sky mutualism commensalism parasitism interdependence cooperation collaboration interaction coexistence host symbiosis organism partner association beneficial ecosystem interactions hosts species coevolution obligate facultative nutrients eukaryotic bacteria fungus algae insects microorganisms evolution adaptation types ecology plants invertebrates termites humans examples biology nature plant animal competition predator symbiont endosymbiosis mutual benefits environmental partnerships biological