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SUMMARY:Fibonacci phyllotaxis in plants and algae\, a biological convergen
 ce with a physical origin - Yves Couder (Laboratoire Matière et Systèmes
  Complexes)
DTSTART:20170921T084000Z
DTEND:20170921T092000Z
UID:TALK80411@talks.cam.ac.uk
CONTACT:INI IT
DESCRIPTION:Plants and brown algae do not belong to the same lineage. Phyl
 ogenetic analysis demonstrates that the divergence between these two clade
 s occurred approximately 1800 million years ago. Their most recent common 
 ancestors were unicellular eukaryotic organisms and the transition to mult
 i-cellularity occurred independently in the two lineages. It is therefore 
 remarkable that similar global morphologies can be observed in both clades
 . The role of physical laws and evolution in these convergences will be di
 scussed using the Fibonacci spiral organization as a test case.&nbsp\;
LOCATION:Seminar Room 1\, Newton Institute
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