Q9: All pseudocoelomate organisms have a complete digestive
Q10: The term tegument is most appropriate for
Q11: The main ill effects in schistosomiasis result
Q12: The Acanthocephala are nonparasitic,freshwater worms.
Q13: Flatworms have three germ layers: ectoderm,mesoderm,and endoderm.
Q15: Gastrotrichs are large,wormlike animals.
Q16: Flame cells are the primary excretory structures
Q17: The nervous system in planaria is
A)absent.
B)a nerve
Q18: Some characteristics of flatworms and ribbon worms
Q19: Digenetic trematodes typically have a vertebrate as
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