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