<div style="background:#fff;border:#bbb dashed 1px;padding:5px"><a href="http://en.citatepedia.ro/comments.php?id=553620" style="color:#000;text-decoration:none"><div style="margin:10px 0"><strong>From Tree To Web</strong></div><div style="margin:10px 0">A Quixotic Quest</div><div style="margin:10px 0"> “The tree of life is a record of how every species that <br>ever lived is related to all others back to the origin of life.”</div><div style="margin:10px 0">For a period of 150 years<br>biology sought the holy grail <br>of the tree of life – today <br>the tree has become obsolete <br>through negative evidence</div><div style="margin:10px 0">Discovery of DNA structure led to <br>molecular evolution studying inheritance <br>as contained in the history of DNA sequences <br>finding species swapped genetic material <br>with each other, hybridising - thus the tree-<br>theory degenerates into impenetrable <br>thickets of interrelatedness </div><div style="margin:10px 0">Bacteria and archaea swap <br>genetic material with other species <br>across huge taxonomic distances <br>in horizontal gene transfer (HGT) </div><div style="margin:10px 0">Darwin assumed 'vertical' descent <br>but when genes were sequenced -<br>DNA replication and protein synthesis <br>showed the promiscuous exchange <br>of genetic information across <br>diverse groups</div><div style="margin:10px 0">**************************<br>Why Darwin was wrong about the tree of life <br>21 January 2009 by Graham Lawton <br>Magazine issue 2692. Subscribe and get 4 free issues. <br>For similar stories, visit the Evolution Topic Guide </div><div style="margin:10px 0">Graham Lawton is features editor of New Scientist</div><div style="margin:10px 0">http: //www.newscientist.com/article/mg20126921.600-why -darwin-was-wrong-about-the-tree-of-life.html? full=true</div><div style="margin:10px 0"><br /></a><br />poem by <a href="http://en.citatepedia.ro/by.php?a=Margaret+Alice">Margaret Alice</a><div class=q> <img src="https://www.citatepedia.ro/g/32share.png" style="float:left" alt="Share"> <script type="text/javascript" src="//s7.addthis.com/js/300/addthis_widget.js#pubid=citatepedia" async="async"></script><div style="display:inline-block" class="addthis_sharing_toolbox" data-url="http://en.citatepedia.ro/comments.php?id=553620" data-title="From Tree To Web de Margaret Alice" data-description="A Quixotic Quest “The tree of life is a record of how every species that ever lived is related to all others back to the origin of life.” For a period of 150 years biology sought the holy grail of the tree of life – today the tree has ..."></div> </div> </div>

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