Lichen colonies on agate pebbles

Lichen colonies on agate pebbles

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Caption: Lichen colonies on the underside of wind-polished agate pebbles. Enough light penetrates through the stones in order for photosynthesis to take place. A lichen is two organisms involved in a mutualistic symbiotic relationship, usually an alga and a fungus. Photographed in Namibia, Africa.

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Keywords: africa, african, agate, alga, amorphous, banded, biological, biology, botanical, botany, chalcedony, chip, chips, duo, fungus, lichen, lichens, light penetration, microbiological, microbiology, mineral, mutualism, namibia, nature, non-crystalline, pair, pebble, pebbles, photosynthesis, plant, quartz, silica, silicon dioxide, stone, stones, symbiosis, symbiotic, translucent, two, underside, undersides, wind-polished

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