Author Question: Against which hard structure do the circular and longitudinal muscles of annelid (Read 723 times)

Charlie

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Against which hard structure do the circular and longitudinal muscles of annelids work?
A) bristles
B) cuticle
C) shell
D) endoskeleton
E) hydrostatic skeleton



camila

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Answer has to be E, trust me!



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Charlie

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Wonderful, you were right, thank you so much.



 

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