Which of the following statements is correct? See Concept 32.4 (Page 680) View Available Hint(s) Which of the following statements is correct? See Concept 32.4 (Page 680) The origin of all extant animal phyla can be traced to the Cambrian explosion. Sponges are diploblastic animals. All animals share a common ancestor. Eumetazoans have three embryonic tissue layers. Most animal phyla belong to the clade Radiata.