Symbiosis means two species working together to create needs for one of the two species, maybe even both. The first symbiotic relationship is called mutualism. For example a Carpenter Bee and a single flower such as Flower Dogwood would work together to make both species more happy. A better way to explain it is the bee collects the nectar. While collecting the nectar the pollen on the flower gets on to the bees bottom. When flying the pollen falls off the bees behind. The bee gets nectar and the flower dogwood gets more of its own kind. The second is called commensalism. For example a Northern Cardinal and an Oak Tree would work together to get happiness the cardinal. The tree doesn't mind if it doesn't get what it wants if it doesn't get hurt. It would give the cardinal a nest and home. The last is called parasitism. For example an American Black Bear and a Tapeworm one tries not to work together because the bear knows what the Tapeworm will do. The Tapeworm will enter the bears intestines and feed on them until it dies. All of these relationships are part of a deciduous forest symbiotic system.