u-/ 



UBIQUITOUS 



ORGANISMS 



Organisms that can tolerate a wide range of 

 environmental conditions or variation; organisms 

 that are so active or numerous as to seem to 

 be present or existent in all types of 

 environments. (See Tolerant Association. 

 Sensitive Organisms ) 



UNICELLULAR 



Refers to an organism that consists of only 

 one cell; e.g., blue green algae, protozoa, 

 bacteria. These organisms may, however, 

 be filamentous or colonial in form. 



