Myxococcus xanthus bacteria, coloured scanning electron micrograph (SEM). M. xanthus is a rod shaped (yellow) gram-negative bacterium that resides in the soil and feeds on other species of bacteria. It is found as single-species clusters, called swarms, which act as a collective unit and show coordinated movement in response to environmental cues. The bacteria are also able to differentiate to form inactive spores (orange) that are resistant to dessication (drying out). Magnification: x11600 when printed 10cm wide.
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