What type of interaction is exhibited by lichens?
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Parasitism
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Symbiosis
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Commensalism
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None of these
B
Correct answer
Explanation
Lichens represent a mutualistic symbiotic relationship between fungus and algae/cyanobacteria. The fungus provides structure and moisture retention while the photosynthetic partner produces food. Parasitism harms one partner, commensalism benefits only one, and lichens clearly demonstrate mutualism.