Lichens are a symbiotic relationship between fungi and either algae or photosynthetic bacteria (cyanobacteria). Yesterday and today we have been observing lichens in the classroom. For some students it has been hard for them to understand the concept that lichens are composed of two different organisms. One source of difficulty has been in preparing wet mount slides of crushed lichens. It is very easy to observe the algae, but harder to see the fungi hyphae. Any suggestions would be helpful.
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