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[British "New Scientist" magazine website reported on November 25] Title: the origin of life in the global coverage of the huge creature
About 30 billion years ago, the Earth is only a "last universal common ancestor (LUCA)" creatures. It forms large, it is an unprecedented huge creature, filled with all the oceans on Earth. It then split into three parts, and ultimately gave birth to the ancestors of all life on Earth today.
The latest research shows scientists,nike free run,http://www.yshdxtd.com/forum.php?mod=viewthread&tid=1753142&fromuid=9261, LU CA early in life is the result of efforts to survive.
In millions of years, LU CA trying to marine genetic exchange into a global facility. Trying to strive surviving cells to exchange useful substances with each other in a non-competitive environment,scarpe nike air max, effectively creating a global coverage of the huge creatures.
About 29 million years ago,http://www.aisyw.com/home.php?mod=space&uid=2323, LUCA split into three different life forms: single-celled bacteria,http://qzfz.org/home.php?mod=space&uid=19133, primitive bacteria,jordan pas cher, and animals and plants can evolve into more complex eukaryotes. You want to know what happened before the split is very difficult. That time almost did not leave any fossil remains,http://090.05qh.com/forum.php?mod=viewthread&tid=291050, any gene can be traced back to that era have been unable to identify the mutation may occur.
University of Illinois at Urbana - Champaign Gustavo Caetano -? say, difficult to describe what insurmountable LU CA's appearance does not exist. Despite the very rapid changes in gene sequences,http://www.zhongzhaopu.com/home.php?mod=space&uid=83281, but a three-dimensional structure of the gene encoding the protein was more stand the test of time. He said that if all existing organisms produce the same general structure of a protein, then the possibility is very big structure of this protein in the presence of the LU CA. He called living fossils such structure,nike shox nz, and pointed out that since the protein is very dependent on its structure,http://www.zhucheng163.com/forum.php?mod=viewthread&tid=634067&fromuid=79272, these living fossils can tell us what to do LUCA.
Protein to rebuild LU CA can generate a collection Caetano - in a modern biological proteins containing 420 kinds of database searches, looking for all the categories have in common protein structure. According to him looking into the structure,nike running,http://www.majiangbbs.com/thread-62556-1-1.html, only 5-11 percent of the structure is universal, which means they save enough from the LU CA structure.
? Amon University of Osnabrueck, Germany Ann said:. "There are discussed fully support (this huge creature) shared genes,http://testbbs.cnopt.com/forum.php?mod=viewthread&tid=256363&extra=, enzymes and metabolites" in only survive in a mixed population of microbial communities in We can still see traces of this gene switching systems.
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發表於 2015-6-17 13:47:36
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