Which trait is a diagnostic feature of echinoderms?

0 votes

 

  

water vascular system

  

pharyngeal gill slits

  

chitin endoskeleton

  

bilateral symmetry

 

asked Dec 29, 2012 in Biology by anonymous
    

1 Answer

0 votes

 

water vascular system

 

answered Dec 29, 2012 by anonymous



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