A diagram on Cladogram of Animals depicts evolutionary relationships among major groups of animals. During evolution, the following important traits are evolved, which are also marked on the diagram: Segmentation As adults: radial symmetry and no cephalization Radial symmetry Protostome development Backbone Segmentation Deuterostome development Organs; 3 Germ Layers; Bilateral symmetry; Cephalization Tissues; 2 Germ Layers Multicellularity Single-celled animal ancestor