1. Multicellular 2. Multicellular, tissues, bilateral symmetry, body cavity, coelom, segmentation, jointed appendages, exoskeleton 3. Annelids 4.Jointed appendages, exoskeleton 5. Evolutionary phylogeny is unknown, but it is known to have some of these adaptive traits (multicellular, tissues, bilateral sym, body cavities, coelom) 6.sponges, jellyfish, roundworms, snails
