منابع مشابه
formation and evolution of regional organizations: the case study of the economic cooperation organization (eco)
abstract because of the many geopolitical, geo economical and geo strategically potentials and communicational capabilities of eco region, members can expand the convergence and the integration in base of this organization that have important impact on members development and expanding peace in international and regional level. based on quality analyzing of library findings and experts interv...
15 صفحه اولAnimal Evolution: Stiff or Squishy Notochord Origins?
The notochord is considered an evolutionary novelty and one of the defining characters of chordates. A new study of an annelid challenges this view and proposes an earlier evolutionary origin in the most recent common ancestor of chordates and annelids.
متن کاملDevelopment of the annelid axochord: insights into notochord evolution.
The origin of chordates has been debated for more than a century, with one key issue being the emergence of the notochord. In vertebrates, the notochord develops by convergence and extension of the chordamesoderm, a population of midline cells of unique molecular identity. We identify a population of mesodermal cells in a developing invertebrate, the marine annelid Platynereis dumerilii, that c...
متن کاملThe notochord
the paper, I immediately understood that it was going to be possible to use Agrobacterium to make transgenic plants and that would, in turn, create many new opportunities. I concluded that plant molecular genetics was poised to take off and that insight, plus some nudging from Shauna, tipped me over the edge. What is your greatest frustration? I am frustrated by the influence of political organ...
متن کاملShaping the zebrafish notochord
Cellular reorganization based on active cell motility and adhesion is the major means of morphogenesis in animal embryos, and is particularly elaborated in vertebrates. Nowhere is this fact more clearly shown than in the dorsal mesoderm of gastrulating zebrafish embryos. Here, occurring in the company of both cellular internalization at the blastoderm margin (Carmany-Rampey and Schier, 2001) (R...
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ژورنال
عنوان ژورنال: EvoDevo
سال: 2015
ISSN: 2041-9139
DOI: 10.1186/s13227-015-0025-3