In reptiles these choppers are conical & uniform; in mammals they have various shapes & sizes
Characteristics: Have teeth; Have hair; Are warm blooded; Have a 
single jaw... [DOC] [TLE] CaliforniaPrehistory.com -- Appendices to Archaeological ... [PAR] The activities of these animals has contributed greatly to the vertebrate .... with 
the human occupation: the amphibians, reptiles, owl, mole, bat, gopher, ....