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  • stages
  • A study found that in the beginning stages of mouse embryogenesis, commencing at embryonic day 7.5, HPCs are produced close to the emerging vascular system. (wikipedia.org)
  • species
  • Darwin also noted, in On the Origin of Species , that a vestigial structure could be useless for its primary function, but still retain secondary anatomical roles: "An organ serving for two purposes, may become rudimentary or utterly aborted for one, even the more important purpose, and remain perfectly efficient for the other. (thefullwiki.org)
  • protein
  • The mechanisms governing embryonic P-granule segregation are poorly understood, although a protein with similarity to receptor tyrosine kinases, MES-1, controls the asymmetric partitioning of P granules during the divisions of P 2 and P 3 ( B erkowitz and S trome 2000 ). (genetics.org)
  • The symbolic structure and narrative sequence dependence of the protein code is exactly parallel to the way that the English language works in our exchange in this email. (wordpress.com)
  • However
  • [ 2 ] However, care must be taken not to apply the label of vestigiality to exaptation , in which a structure originally used for one purpose is modified for a new one. (thefullwiki.org)
  • types
  • Variations in the amount of yolk and in the number and types of protective structures are associated with the food needs and environment of the embryo. (britannica.com)
  • process
  • Apart from general textural appearance and color, the finely detailed structure of an iris is not genetically determined but develops by a random process. (udayton.edu)
  • sequences
  • Sequences of DNA are only partially responsible for the structure of these histones and they are regulated by other external and internal factors aside from other segments of DNA. (wordpress.com)
  • individual
  • We asked whether pH and [O 2 ] levels might affect the incorporation of element ratios (B:Ca, Mg:Ca, Sr:Ca, Ba:Ca, Pb:Ca, U:Ca) into squid embryonic statoliths as (1) individual elements and/or (2) multivariate elemental signatures, and consider future applications as proxies for pH and [O 2 ] exposure. (mdpi.com)
  • material
  • An egg consists of a yolk, or stored food, and protective structures, such as a hard or horny shell, a material called the white, or a jelly layer. (britannica.com)