No backbone you are wrong invertibrates have no backbone but vertibrates do have a back bone
http://wiki.answers.com/Q/What_are_the_characteristics_...
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Vertebrates can be classified into five groups, based on their skin covering, how they reproduce, how they maintain body temperature, and characteristics of their limbs (arms and legs, or their equivalent ... Knowing the five classes of vertebrates and their characteristics helps you to understand more about these animals...
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www.davidlnelson.md/Cazadero/FiveVertebrates.htm
www.davidlnelson.md/Cazadero/FiveVertebrates.htm
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Some characteristics shared by most or all vertebrates (in addition to those traits shared among all chordates) include the following (after Hickman, 1994):
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animaldiversity.ummz.umich.edu/site/accounts/informatio...
animaldiversity.ummz.umich.edu/site/accounts/information/Vertebrata.html
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Animal Index - Vertebrates ... Animals with an internal skeleton made of bone are called vertebrates. Vertebrates include fish, amphibians, reptiles, birds, mammals, primates, rodents and marsupials. ... Science Main Index...
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www.kidport.com/RefLib/Science/Animals/AnimalIndexV.htm
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Vertebrae differ considerably in form among different groups of vertebrates. In many vertebrates, the ventral side of the centrum bears spines, which in bony fish fuse to form the haemal arch, through which the main blood vessel passes.
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www.ucmp.berkeley.edu/vertebrates/vertmm.html
www.ucmp.berkeley.edu/vertebrates/vertmm.html
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These two early adaptations were made possible by three important vertebrate characteristics, ... By the beginning of the Devonian Period (about 410 million years ago), vertebrates with jaws had diversified into four main groups, acanthodians, Placoderms, cartilaginous fishes, and bony fishes. By the end of the Devonian...
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geology.er.usgs.gov/paleo/vertebra.shtml
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Although some of the finer points of animal classification are still being disputed, children can benefit from learning that animals can be grouped together if they share enough characteristics. Animals are divided into two main groups: vertebrates (with internal backbones) and invertebrates (without internal backbones).
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www.msnucleus.org/membership/html/k-6/lc/organ/2/lco2_1...
www.msnucleus.org/membership/html/k-6/lc/organ/2/lco2_1a.html
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In this unit students study the characteristics of a wide variety of animals within the animal kingdom. A major classification division of vertebrates and invertebrates is examined. Distinguishing characteristics of different animals within ... Recognize distinguishing characteristics among vertebrates. ... Evergreen Main Menu...
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www.sasked.gov.sk.ca/docs/elemsci/gr4ujesc.html
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General characteristics of vertebrates ... Vertebrates may be characterized by 12 general derived characteristics. You should become very familiar with these traits, and identify how they are expressed in the vertebrates you will see in lab. ... Contains three main groups:
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www.shsu.edu/~bio_mlt/Chapter3.html
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