25. a roundworm has only longitudinal muscle (and a body cavity), while an earthworm (an annelid) has both longitudinal and circular muscle, and its body cavity is divided up by complete septa that isolate each "mini-cavity" within each body segment from that of the segment in front and the segment behind. How do these features of the two worms body structure affect the way that they move?
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they both move by locomotion
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