Multicellular colonies

The morphology of cyanobacteria varies widely, and they include spherical, ovoid, and cylindrical unicellular species, as well as multicellular colonial and filamentous forms (e.g. Coute and Bernard, 2001). Some species differentiate to form various specialized cells, such as heterocysts, which are able to fix nitrogen in water under N-limited eonditions, and akinetes, which allow them to survive when environmental conditions are not favorable for growth. This high phenotypic plasticity makes it rather difficult to identify cyanobacteria to the species level. 

Protists Eukaryotic microorganisms that are neither animal, fungi, plant, or archaean. Unicellular forms include the amoeboid protozoans and algae, such as the foraminferans and radiolarians, and dinoflagellates and diatoms, respectively. Some algae are either multicellular or colonial, such as the red algae and freshwater Volvox, respectively. 

B Multicellular plants, either single or in colonies, distinctly filamentous vegetative reproduction by groups of cells termed... 

Mendelson, N.H. (1999). Bacillus subtilis microfebres, colonies and bioconvection patterns use different strategies to achieve multicellular organization. Environmental Microbiology 1, 471 77. 

If such an inherent mechanism exists, that in a large multicellular community a few selected stem cells are turned back to a stage of their primordial existence in order to survive the demise of their host, would individuals suffering heart attacks, strokes and other life-threatening emergencies (infections septic shock) harbor incipient colonies of these pre-cancerous cells In case of death, only a very meticulous postmortem examination could possibly reveal such an as yet hidden process. In case of the host s survival of the acute threat is the incidence of malignant tumors increased, or are the initiated processes regressing (by Burnet s surveillance) ... 

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