Some information related to oxygen, ignore it if you want.
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Here is the growth of some wild bird seed spawn and WL-Tek nutritional paper pellets (added plant fertilizer, enriched), grow-up style (grows towards oxygen).
Notice the change as it gets closer to oxygen, and band formed when consolidating (getting thicker).
Even with the lid left on, the colony tried to fruit from areas with highest oxygen, but produced no cap (requires oxygen) .
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A sample on an earlier version of black tea agar, growing towards oxygen, and again changing phenotype.