Imagine you want to use an enrichment culture to attempt to isolate individual species of cyanobacteria from greenlake. you set up a flask with an appropriate nutrient solution and a small sample of lake water, cover the flask loosely with a cap that is not airtight, and place the flask under a source of light. which of the following would you not include in your culture medium so that you would encourage the growth of cyanobacteria relative to other microorganisms? (a) phosphorus(b) nitrogen(c) iron(d) carbon(e) sulfate(f) potassium
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