Environmental Engineering Reference
In-Depth Information
FIGURE 13.1
Streamers composed of the sulfur-oxidizing bacterium
Thermothrix
at Mam-
moth Terrace, Yellowstone National Park (courtesy of R. W. Castenholz) and a transmission
electron micrograph of a heterocyst (the site of nitrogen fixation in
Nostoc
and other
cyanobacteria) attached to a smaller dividing vegetative cell with a diameter of approximately
8
m (micrograph courtesy of N. J. Lang).
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