-two organisms living together
types of symbiotic relationships
- mutualism - both members of the association benefit
- commensualism - no apparant benefit or harm to either member of the association
- parasitism - an organism that grows, feeds, and is sheltered on or in a different organism while contributing nothing to the survival of its host.
more on parasitism...
- generally the parasite is smaller than the host
- interactions based on biological fitness
- results in the modification of host behaviour
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