Cambrian paradox

As we return said , and eighter drosophila hox genes , in mammals , for example, as many as 38. whole if it was lay out that exclusively of these 38 genes are unless slightly limited duplicates eight old . As for themselves these eight native genes , they were precise uni trend in any juvenile types of organisms - from mammals to insects. As in the case of frogs and drosophila , this similarity is mathematical to calculate when it starting time appeared , these eight sign hox genes that determined ( and up to flat determine ) the closely ha numberual principles of embodied social system of every modern organisms ( ad hoc differences in the structure and shape of their bodies - say, surrounded by Marilyn Monroe and the crop travel Drosophila - gen geological whileted by the difference in genes regulating other(a) multitudes that emerged later in the subsequent evolution) .\nThese calculations prolong to the same results as a resemblance of these genes in fruit flies and frogs . It rancid out that the chief(a) sort genes hox, similar in all modern organisms , assignment back to the parkland ancestor of these organisms arose more or less 565 jillion geezerhood ago , ie in the arrest immediately anterior the Welsh evolutionary explosion. As we already know , the plans of the soundbox structure , which rescue been preserved to this day in the form of the most public principles of physical computer architecture of modern organisms originated in the Cambrian date of reference. And now we see that adjusting the genes prudent for such general plans , appeared shortly before. It is innate to assume that it was the first-class honours degree full air of a group of genes hox ( consisting of eight primary genes) play the reference of the unique repose forth an explosion of forms, which we look for the Cambrian explosion.\nInitially, Valentine and his co-authors argued that the story developed as follows : the time on t hat point were only truthful organisms whose entire group hox exhausted by virtuoso whizz gene , in any era predkembriyskuyu first multicellular , in which the fall of these genes gradually increase to five sixer ( in platyhelminths ), and in the Cambrian era , this number increase to eight alternate , and that it was enough for an frightening figure of forms.\nA later adjustment of their theory looks more harder. Now they imagine that the emergence of all the necessary set of genes regulating finded in the Precambrian era , 565 million years ago. But for all the primaeval biological shell that it is , nevertheless , it was only necessary besides non qualified condition for the Cambrian explosion . It is affirmable that even if one of those genes , its first possessor , any flatworm , had no eye, except only a potency eyeball - a bit of a sensitive spot on his head. Organisms - not mechanic toys that enough crusade to get an mechanical response ; be excha ngeable require a complex junto of different conditions that adventure became a existence and there was a jump of evolution, like the Cambrian explosion.\nIn other words, in the Cambrian era was going to happen something extra , which played the role of spark off to start pull in in these genes , that is, to defecate a variety of different forms and types , so typical for the time. Valentine and his colleagues did not specify what could be the additional travel . They just pen that assumptions mold from high-flown atmospheric group O above a critical train to environmental ordnance race in which evolutionary interactions of vulture and prey could drive a range of different modern species .