what is called lichens?????? science
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A lichen, or lichenized fungus, is actually two organisms functioning as a single, stable unit. Lichens comprise a fungus living in a symbiotic relationship with an alga or cyanobacterium (or both in some instances)
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A composite organism made up of a fungus,usually an ascomycete,that grows symbiotically with an alga and characteristically forms a crustlike or branching growth on rocks or on tree trunks.They occurs as greyish green growth on rocks....
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