Completar Frases LIVING THINGS' CLASSIFICATIONVersión en línea Complete the text about animals por Lauri Lala 1 fish cord five arthropods porifera annelids reptiles molluscs echinoderms birds spinal invertebrates mammals coelenterates vertebrates amphibians Animals can be classified into , if they have a spinal cord and , if they do not have a . There are groups of vertebrates animals : , , , and . Invertebrate animals are classified into six groups : , , , , , and .