Cyanobacteria are capable of many biochemical reactions that other organisms depend on. In addition to being the primary prokaryotes to employ oxygenic photosynthesis, many cyanobacteria can make their fertilizer by fixing which element (that is, converting an inert form into a biologically useful form)?
A. Potassium
B. Phosphorus
C. Calcium
D. Nitrogen
E. Oxygen
F. Carbon Dioxide