Completar Frases LIVING THINGS' CLASSIFICATIONVersión en línea Complete the text about animals por Lauri Lala 1 echinoderms vertebrates porifera five molluscs amphibians annelids reptiles spinal invertebrates coelenterates fish arthropods cord birds mammals 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 .