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    				| 1. | What is lichen? what is lichen ?what is lichen? | 
| Answer» lichen is a simple slow-growing plant that typically forms a low crusty, leaflike, or branching growth on rocks, walls, and trees. {OR}A lichen is a composite organism that arises from ALGAE or CYANOBACTERIA living among filaments of MULTIPLE fungi species in a mutualistic relationship. LICHENS have different properties from those of its component organisms | |