"What characteristic is responsible for the branching off of the roundworms from earlier animals?", "pseudocoelomate body plan" "What type of digestive system is seen in these animals?", "alimentary canal" "What level of organization do these organisms demonstrate?", "organ-system level" "How many tissue layers do these organisms have?", "triploblastic" "When do they show up in the evolutionary history?", "Precambrian" "Type of excretory system?", "Waste exits the excretory pores" "Why is it considered a "false cavity"?", "It is not lined with mesoderm" "Where are they found?", "worldwide" "What phylum is it in and what is the common name?", "phylum: Nematoda<br /> roundworms" "", "A. cuticle<br /> B. epidermis<br /> C. pseudoocoel<br /> D. longitudinal muscles<br /> E. dorsal nerve cord<br /> F. ventral nerve cord<br /> G. intestines"
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