18 marzo 2015
Early in our embryogenesis, the two main body axes are established to provide positional cues through a coordinate system for the differentiating cells. A research team has now found evidence for an ancient origin of the back-to-belly axis in a sea anemone. The signaling system that is responsible for the establishment of this axis was already present at least 600 million years ago.
http://feeds.sciencedaily.com/~r/sciencedaily/~3/vAJVEtAgaG8/150318101233.htm
