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Many of these survivals are described by Brinton in a chapter of his " Essays of an Americanist " . From those samples , there was very poor to no survival of the perennial ryes . This survival and passing of genes is natural selection , the mechanism that drives evolution . In 1994 , prior to closure of the trial , and before any survival information was disclosed , the survey was repeated with 21 of the original 26 surgeons . SOLAS stipulates that all survival craft must be capable of being launched with their full complement of persons and equipment within thirty minutes of the abandon ship alarm being given . All survival surgical procedures on rabbits , cats , dogs , nonhuman primates , or other large animals must be performed in designated surgical suites approved by the A-PLAC in consultation with the Attending Veterinarian . This survival reflex helps them to find food such as a nipple . However , the GM may , if it seems appropriate , grant a +2 synergy bonus on any Survival checks made to avoid mishaps for a character with 5 or more ranks in Knowledge ( physical sciences ) . A series of studies could not show any survival benefit using postoperative adjuvant radio - or chemotherapy after complete resection of the tumor . No survival for the British Empire , no survival for all that the British Empire has stood for , no survival for the urge , the impulse of the ages , that mankind shall move forward toward his goal . If we have any survival in our trials , those perennials will be truly tough since they will have survived multiple frost heaving , desiccation , water and cold stress without a subnivean insulation barrier . CONCLUSION : Although the prognosis for patients with invasive type gastric cancer remains poor , there have been a few long-term survivors , in whom this survival was associated with aggressive combination therapy , including surgery , i.p ., and i.v . This survival of the fittest is done with a `` genetic algorithm '' that mimics , in a crude but effective way , the process of natural selection proposed by Charles Darwin . It is important that people try to understand this new research , if only to steer themselves clear of therapies which may be toxic and have no survival benefit . On the main road of the island , where it crosses the valley of Taipi , Mr. Osbourne tells me they are to be reckoned by the dozen ; and as the roads have been made long posterior to their erection , perhaps to their desertion , and must simply be regarded as lines drawn at random through the bush , the forest on either hand must be equally filled with these survivals : the gravestones of whole families . A pocket watch has no DNA that can be altered over time , no method of self-replication , and there are no survival pressures in the drawer to act upon the watch in the form of natural selection .