Fill in the Blanks VERTEBRATES AND INVERTEBRATES Online version VERTEBRATES AND VERTEBRATES by MARIA JESÚS SS 1 two mollusks amphibions backbone invertebrates invertebrates mammals The animal kingdom is divided into groups : vertebrates and . Vertebrates have a and do not . The vertebrates animal are classified into a , reptiles , , birds and fish . The invertebrates animal are classidied into a arthropos and .