"What characteristic is responsible for the branching off of the segmented worms from earlier animals?", "eucoelomates" "What level of organization do these organisms demonstrate?", "organ level system" "How many tissue layers do these organisms have?", "triploblastic" "What is the name of the bristles seen on some of these animals?", "satae" "What is the name of the side feet seen in some animals?", "parapodia" "When do they appear in the evolutionary history?", "516 mya early Cambrian" "What habitats are they found in?", "ocean and freshwater" "Type of Digestive System", "Alimentary Canal" "Type of Excretory system", "Metanephridia" "Type of Circulatory System", "no true heart" "Type of Respiratory System", "Parapodia" "Type of Nervous System", "pair of cerebral ganglia" "Type of Body Cavity", "Eucoelomate"
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