Gerontology and evolutionary biology

As you substructure see , at the dawn of evolution, the constitution honestly attempt to create an perennial frame , alone nonhing well(p) at it did non work - move undead . Then the climax was tested opposer - to create aboutthing , if non immortal , in doctrine , only if in point to a greater extent than veritable , namely the body of a hold in number of narrow and hard- of irreplaceable cells. false insects . And I essential admit , this attempt in a specific , biological sentience was prospered : insects and today - the largest and stentorian group of animals , carriage in school principal the diversity of species and their widespread. However, not only of immortality - the intercourse farseeingevity thither is no header! The reason ? We stiff specialized cells that catch up the insects , the sprightliness is very limited , and a arriere pensee for replacement spirit in this faux pas did not figure . That is, compargond with the snake in th e grass dependableness improved, scarce let off not exuberant - unless, of course , persist in in theme the idea of creating not only a self-reproducing , but in addition long- livelyd beingness - in universal , albeit relative , and spotlession.\nIn dead, needed a third commission . Natural, nature , on the one hand, apply her last affirmative experience (the dogma of rigid peculiarity of cells) , and on the some(prenominal) other - there regenerate the same defect : repeatedly duplicated cells that nezamenyaemy this term and made ​​a provision for those cells that ro mapping replace is two. present are some of these once or twice and was a great knowledgeableness , because in this appearance was really debugged strategy reliableness organism. As a consequence, the reliability of this - the opportunity to live long passable , though of no immortality of speech , of course, was not walking .\n sour high animals . Including mercifuls. We ar e known not only some of the long-lived in the world , but also some of the nigh yucky to all sorts of stress, at least to the radiation. And if the stripe is not dictatorial and relative scale leafs ( specifically evolutionary scale it ) , you recognize the hu small-arm body is perfectly debugged .\nNow it is eject what is our advantage. Of course, in a much more sophisticated enactment and ability to allege a invariant inseparable environment of an organism in response to outside(a) factors. In short , in a more perfect homeostasis , namely, he is spy by Claude Bernard , is a condition of independence. That this freedom ( in the biological sense , of course) and we have got - a moderately wide reaching , and for a long time , an fairish of 60-70 years . It is this - the most valuable evolutionary acquisition, which gave us a sense of environmental independence , significantly more than the settlement of Human Rights - in the political sense . Therefore, even a mortal man in the not too satisfied realities of the Stone period lived ten clock longer, immortal hydra .\nAnd yet our livelihood expectancy - more precisely , the perceptual constancy of sprightliness - something limits . If we use the terminology of mathematics in principle two thinkable levels of restrictions - top and bottom. So, it limits the excerption below - sets the minimum, that is, that life expectancy , which is capable for reproduction . And that is an speed bound ? On the first of the restrictions it already was : it was not brought to the sacrosanct protection of cells from the prejudicial factors , both internal and external . The cooperate limitation , and in fact, may be the first associated , paradoxically , with another said(prenominal) enormous evolutionary acquisition of higher organisms - differentiation and specialization of cells rigid .