ancestor 251 What is a cladogram? 2.52 Name the feature labeled C common to animal phyla labelled 3 an as well as the Arthropoda and Chordata 2.5.3 Provide labels for animal phylum numbered 1, 2 and 3. 2.5.4 State ONE disadvantage of an exoskeleton in Arthropoda and exp how they overcome that disadvantage. (1​