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One example of a symbiotic relationship is between wolves and moose. This relationship is classified as the predation level. Wolves feed off the moose. In this case, wolves benefit, moose do not.
Predation - (+-) : One organism kills and eats another organism
Predation - (+-) : One organism kills and eats another organism
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Moose ticks were one of the diseases that caused the moose population to dramatically decrease. The relationship of the two would be classified as parasitism. The tick is living off the moose (another living organism). The tick benefits, the moose is negatively affected.
Parasitism - (+-) : A parasite lives off a living organism
Parasitism - (+-) : A parasite lives off a living organism
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Another symbiotic relationship is moose feeding off of Balsam Fir trees. The moose benefits in this relationship, the trees are not affected. This would be called commensalism.
Commensalism - (+0) : One organism benefits, the other organism is not affected
Commensalism - (+0) : One organism benefits, the other organism is not affected