Unicellular colonies

Unicellular, colonial, or filamentous, uninucleate green algae, without zoospores, or isogamous or heterogamous. 

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 Unicellular to colonial microscopic organisms cells typically with poorly differentiated nuclei and chromatophores motile or non-motile, with or without chlorophyll, never with pure chlorophyll-green color reproduction by binary fission resting spores or cells commonly present without sexuality.Division Schizophyta (Protophyta), Phylum Schizophyta (Page 6)... 

A Unicellular plants, either single or in colonies, rarely in filaments. 

Bacteria are unicellular organisms that exist either isolated or in colonies and generally reproduce asexually (binary fission) with the cell splitting... 

Prokaryotic Unicellular, filamentous, colonial or mycelial Little or no differentiation Anaerobic, aerobic, facultatively-anaerobic, microaerophilic or aerotolerant Asexual reproduction Cell walls (with some exceptions) bacteria and archaea Monera... 

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. 

Algae are photosynthetic, non-vascular organisms, many of which are unicellular, or are found in colonies of several cells these kinds of algae are microscopic. 

Algae are chlorophyll-containing eukaryotic organisms which may be either unicellular or colonial. ... 

Order Diatomales.—Family Diatomacese.—This family comprises several thousand species of unicellular plants called Diatoms which are found in fresh, brackish and salt water, forming much of the diet of small animals. While unicellular, they frequently are united in colonies. They all possess chromatophores containing... 

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