Answers

2014-03-02T10:38:48+05:30
Lichens is very slow-growing plant. It takes years to grown sometimes more than that. typically forms a low crust-like. 

The another meaning of 
lichens is, its a skin diseases .
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2014-03-02T16:03:06+05:30
Lichen is a plant that take a long period of time to grow .
 Another meaning of 
lichens is a skin diseases .
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