A) a water vascular system
B) an elastic rod (notochord)
C) achitinous exoskeleton
D) a ventrally placed nerve cord
Correct Answer: B
Solution :
Chorda tes always comprises an elastic rod (Notochord) in any stage of life cycle, which included all vertebrates, hemichordates, urochordates, and cephalochordates.You need to login to perform this action.
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