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A chlorophyllous heterotrophic thallophyte is a _____. Sometimes, in order to get around this obstacle, they could form a symbiotic bond with an alga or cyanobacterium.

Fungi can be incredibly sophisticated multicellular organisms or single-celled critters. Because it has chlorophyll, the algae can create food, and in exchange, the fungi give the algae a secure environment that protects it from UV rays. Lichen is a good illustration of how two organisms may work together as one.