Resources - things an organism needs for survival, Competition - when organisms fight for the same resource, mutual relationship, Parasitism - when one organism takes resources from another organism, causing it harm, Commensalism  - when one organism benefits and one organism is neither helped nor harmed, commensal relationship , Mutualism - when two or more organisms work together to get resources they would be less likely to get individually, Defense Mechanism - a method used to protect an animal from parasites or predators, Host - the organism from which a parasite takes its resources (usually larger), zooxanthella (zooxanthellae-plural) - A single celled algae that can be found in living tissue of building corals, parasitic relationship, producer - An organism capable of making its own food, consumer - an organism that gets its food from other organisms, symbiont - This is usually the smaller organism in a symbiotic relationship,

Ecological Relationships

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