Scientists have discovered that cells, in a fashion similar to water vapour condensing into dew, are able to collect and focus subcellular organisms responsible for embryo development through utilisation of basic phase transition.
Discovered at the Marine Biological Laboratory by scientists in the 2008 Physiology course whilst studying C.elegans worms, scientists determed that subcellular 'P-granuales' are liquid droplets that shift between a dissolved and condensed states. when a single-celled embryo has been recently fertilised, the P-granuales are melting in the cell, much like water droplets do at high temperatures. Interestingly, just before the inital cell division, the same P-granules quickly solidify at the exterior of the cell where the temperature has decreased. The progenitor germ cell then develops where the P granules previously solidified. P granules are believed to be responsible for determining the 'germ cells' that eventually give rise to gametes.
http://www.sciencedaily.com/releases/2009/05/090521141204.htm
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