The invertebrate chordates lack _________.

0 votes
    pharyngeal gill slits
    a dorsal, hollow nerve cord
    a post-anal tail
    a backbone
    all of the above

asked May 30, 2013 in Biology by anonymous
    

1 Answer

0 votes
a backbone
answered May 31, 2013 by Bioshare ~Top Expert~ (34,070 points)



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