Topic: Crustose Lichen
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Answers to Common Questions
How do crustose lichens survive on rock?
Lichens do not have roots and do not need to tap continuous resevoirs of water like most higher plants, thus they can grow in locations impossible for most plants, such as bare rock, sterile soil or sand, and various artificial structures s... Read More »
Source: http://answers.yahoo.com/question/index?qid=20061129010036AAwgFSG
