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

Topic: Vertebrate


Related Topics

  
 Vertebrate - MSN Encarta
Vertebrates make up only about 2 percent of the animal species, and they belong to just 1 of more than 30 phyla, or overall groups, in the animal kingdom.
The only vertebrates that do not have this kind of skeleton are cartilaginous fish, a group that includes sharks, skates, and rays.
A vertebrate's spinal column is held together by strong ligaments, but the faces of adjoining vertebrae are separated by elastic pads called intervertebral disks.
encarta.msn.com /encyclopedia_761558106/Vertebrate.html   (854 words)

  
 Vertebrate Encyclopedia @ AlienArtifacts.com (Alien Artifacts)   (Site not responding. Last check: 2007-10-21)
Vertebrates started to evolve about 530 million years ago during the Cambrian explosion, which is part of the Cambrian period (first known vertebrate is Myllokunmingia).
Defining characteristics of a vertebrate are a backbone or spinal cord, a brain case, and an internal skeleton.
In higher vertebrates the size of the brain relative to the size of the body is greater.
www.alienartifacts.com /encyclopedia/Vertebrate   (595 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.