66) X-Ray Fish are one of the few phylum chordata with a visible backbone. The four characteristics of a member of phylum chordata is they have to have a notochord, a hollow dorsal nerve cord, pharyngeal slits, and a post anal tail.
Showing posts with label sources (http://en.wikipedia.org/wiki/Chordate). Show all posts
Showing posts with label sources (http://en.wikipedia.org/wiki/Chordate). Show all posts
Wednesday, June 9, 2010
Subscribe to:
Posts (Atom)