Whatever the advantages and disadvantages of each theory are, the ability of every cell (excluding cells without a nucleus, e.g., the erythrocytes of mammals) to release DNA/RNA sequences or de novo created viruses is unique and amazing. At the same time, the cell’s ability to release DNA/ RNA sequences shows a high level of evolutionary conservation. These facts might be well enough motifs for identification of positive selective pressure that could be linked with this genome ability, as well as a highly important thesis for better understanding of origin and evolution of viruses, and even life as we know it [3–5]. Several factors of positive selective pressure could play important role in development and evolutionary ‘‘symbiotic’’ linking (conservation) of genome and its ‘‘instability’’, which is probably responsible for cell ability to emit de novo created viruses: (i) the possibility of horizontal and vertical dissemination of gene blocks, and their incorporation into the cell genome of new hosts; (ii) the possibility of acceleration of evolutionary processes, which could result in rapid diversification of species and sometimes quicker and better adapting to environmental conditions; (iii) the possibility that de novo created viruses can act as natural biological weapons against predator and/or concurrent species.