Mark Martin returns to TWiM for a discussion of the frightening global burden of bacterial antibiotic resistance, and a solution to the problem of daylight nitrogen fixation in a cyanobacterium, despite the incompatibility of nitrogenase with oxygen produced during photosynthesis.
Vincent, Elio, and Michael discuss a symbiosis between a nitrogen-fixing cyanobacterium and a single-celled eukaryotic alga.
Vincent, Michael, and Michele discuss how soil-dwelling bacteria induce the formation of root nodules on legumes via a protein called CYCLOPS.