Factbites
 Where results make sense
About us   |   Why use us?   |   Reviews   |   PR   |   Contact us  

Topic: Tetramery


  
  [Cnidaria] Aurelia with 6 gonads
Thus, there may be some genetic component to the variation.
In one lineage observed over 4.5 months, the rate of non-tetramery declined substantially from an initial high of 88.9% to a final cumulative low of 29% Apparently this lineage was able to stabilize tetramery over time, possibly indicating some self-correcting developmental mechanism.
Furthermore, no difference was found in variation rates between stressed and unstressed polyps, indicating that environmental factors may not play an important role in symmetry determination in these animals.
maillists.uci.edu /mailman/public/cnidaria/2004-May/000780.html   (357 words)

  
 Gunnerales are sister to other core eudicots: implications for the evolution of pentamery -- Soltis et al. 90 (3): 461 ...
groups characterized by tetramery and pentamery (Endress, 1996
There are many highlighted examples of transitions of pentamery
to tetramery (or other merosities) and the mechanisms for the
www.amjbot.org /cgi/content/full/90/3/461   (5858 words)

Try your search on: Qwika (all wikis)

Factbites
  About us   |   Why use us?   |   Reviews   |   Press   |   Contact us  
Copyright © 2005-2007 www.factbites.com Usage implies agreement with terms.