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Lichens
A lichen is a composite organism that arises from algae or cyanobacteria living among fungi species in a mutualistic relationship. It's a plantlike organism that forms a low crusty, leaflike, or branching growth on rocks, walls, or trees.
A lichen is a composite organism that arises from algae or cyanobacteria living among fungi species in a mutualistic relationship. It's a plantlike organism that forms a low crusty, leaflike, or branching growth on rocks, walls, or trees.
