Draw a cladogram that for the following animals: sponges, cnidarians, flatworms, echinoderms, chordates, molluscs, annelids, nematodes, and arthropods. On your cladogram indicate the points where the following evolved: 1) true tissues, 2) bilateral symmetry, 3) three germ layers, 4) segmentation, 5) protostome development, and 6) deuterostome development.
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