Strange organism has unique roots in the tree of life

  • metta

    Posts: 39090

    May 02, 2012 11:00 PM GMT

    Strange organism has unique roots in the tree of life

    " A single-celled organism in Norway has been called "mankind's furthest relative." It is so far removed from the organisms we know that researchers claim it belongs to a new base group, called a kingdom, on the tree of life."

    " A single-celled organism in Norway has been called "mankind's furthest relative." It is so far removed from the organisms we know that researchers claim it belongs to a new base group, called a kingdom, on the tree of life."

    http://www.msnbc.msn.com/id/47225834#.T6G69at8Bku
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    May 06, 2012 11:05 PM GMT
    It seems like they need to explore more genomes of other protists around the world. It would be interesting to determine that we have found an even earlier representation of eukayotes, but their theory is still premature. My inclination is that they will find many synonymic traits between the two groups. Where do you draw the line between one kingdom and another?

    I find it odd that this is more exciting and pronounced in the media as finding other new species. Over 2 families, 100 genera and over 1,000 new species of arachnids were described in 2011. Seems like there is a lot of relevant news that the media doesn't realize is out there.
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    May 06, 2012 11:23 PM GMT
    Still not quite as old as stromatolites, which have been dated to 3.45 billion years. icon_wink.gif

    800px-Stromatolites_in_Sharkbay.jpg

    Maybe they were cousins? icon_lol.gif
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    May 06, 2012 11:48 PM GMT
    paulflexes saidStill not quite as old as stromatolites, which have been dated to 3.45 billion years. icon_wink.gif

    Maybe they were cousins? icon_lol.gif


    Stromatolites are created by sediment getting caught in the mucus layers created by cyanobacteria (prokayotes) and then hardening by cementation from calcium carbonate build-up.

    It is already current theory that cyanobacteria are the precursors to eukaryotes. It is common sense that they would be older because they are prokaryotic organisms. The point the article is and the research is making is that they claim have found a living organism that is oldest found eukaryotic organism.

    I'm not sure you have the basic grasp of the concepts they are talking about.
  • metta

    Posts: 39090

    May 07, 2012 12:11 AM GMT
    Comparing Prokaryote and Eukaryote Cells
    Understanding Differences in Cell Structure

    "All living organisms can be sorted into one of two groups depending on the fundamental structure of their cells. These two groups are the prokaryotes and the eukaryotes.

    Prokaryotes

    Prokaryotes are organisms made up of cells that lack a cell nucleus or any membrane-encased organelles. This means the genetic material DNA in prokaryotes is not bound within a nucleus. Additionally, the DNA is less structured in prokaryotes than in eukaryotes. In prokaryotes, DNA is a single loop. In Eukaryotes, DNA is organized into chromosomes. Most prokaryotes are made up of just a single cell (unicellular) but there are a few that are made of collections of cells (multicellular). Scientists have divided the prokaryotes into two groups, the Bacteria and the Archaea.

    Eukaryotes

    Eukaryotes are organisms made up of cells that possess a membrane-bound nucleus (that holds genetic material) as well as membrane-bound organelles. Genetic material in eukaryotes is contained within a nucleus within the cell and DNA is organized into chromosomes. Eukaryotic organisms may be multicellular or single-celled organisms. All animals are eukaryotes. Other eukaryotes include plants, fungi, and protists."

    http://animals.about.com/od/animalswildlife101/a/diffprokareukar.htm


    Image3.gif


    http://etap.org/demo/biology1/instruction3tutor.html
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    May 07, 2012 3:32 AM GMT
    Thanks for posting the differences between prokaryotes and eukaryotes. I think I came off as rude from the last comment. Sorry. icon_rolleyes.gif