This symbiotic association grows on rocks, where it begins the process of soil formation, and it is a major food source for caribou.

Name: This symbiotic association grows on rocks, where it begins the process of soil formation, and it is a major food source for caribou.
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Lichens are a symbiotic association between a fungus and either an algae or a cyanobacteria. They can grow on rocks and are important in the process of soil formation. Lichens are also a major food source for caribou.

This Symbiotic Association Grows on Rocks, Where It Begins the Process