It is assumed that the cell envelope structure of Archaea is a key prerequisite for these organisms to be able to dwell under extreme environmental conditions such as temperatures up to 120 °C, pH down to 0, high hydrostatic pressure, or high salt concentrations (De Rosa, 1996; Stetter, 1999; Hanford & Peeples, 2002; Albers & Meyer, 2011).
Although water is a prerequisite for life, some organisms have developed mechanisms to cope with frequent episodes of water limitation.
While our diagnosis was not confirmed by culture, this is not a prerequisite for the diagnosis since these organisms are difficult to grow and frequently cultures yield no growth.
At present and from the aspect of the perspective development of our civilization the importance of physical fitness is pushed into the background; nevertheless adequate physical activity level is even today an important prerequisite for normal function of the organism as a whole.
A suite of universal gene markers that could be used on a whole group of organisms is a prerequisite for multilocus DNA barcoding.
Considering the whole of biodiversity, and not only charismatic organisms, is a prerequisite for the development of efficient conservation plans, of prolific bioprospecting activities, and for enhancing our understanding of biodiversity on a global scale8, 17, 59.
However, a surprisingly limited body of information exists concerning the real concentrations and behavior of these materials in natural environments and their interactions with living organisms as a prerequisite for safety evaluations.
In a more general way, resolution of interspecies relationships of closely related organisms is a prerequisite for an improved comprehension of species evolution and factors contributing in this process.
Ansari et al. [49] demonstrated that the colonies were grown without AgNPs, the organisms appeared as dry crystalline black colonies, indicating the production of exopolysaccharides, which is the prerequisite for the formation of biofilm, whereas when the organisms were grown with AgNPs, the organisms did not survive.
Cell adhesion is an essential prerequisite for survival, communication, and navigation of cells in organisms [43].
