**Remember that lichens are two separate organisms, a fungus and an algae, that live together in symbiosis. Each organism brings special abilities to the relationship resulting in these adaptations:

• The fungus has a relatively thick outer surface which protects the overall structure of the lichen.

•The fungus is also very absorbent, storing water for use at a later time.

• Lots of tiny filaments anchor the fungus to the rock.

• The algae photosynthesizes producing food for itself and the fungus.