Yellow lichen background on the gray wall stone. A lichen is a composite organism that arises from algae or cyanobacteria living among filaments of mu

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Yellow lichen background on the gray wall stone. A lichen is a composite organism that arises from algae or cyanobacteria living among filaments of multiple fungi species in a mutualistic relationship

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Size: 5401px × 3601px
Photo credit: © Taras Khimchak / Alamy / Afripics
License: Royalty Free
Model Released: No

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