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A Structure Found in Lancelets (Cephalochordates) but Not in Tunicates

Question 4

Multiple Choice

A structure found in lancelets (cephalochordates) but not in tunicates (urochordates) is

A) a vertebral column.
B) a notochord.
C) a hollow dorsal nerve cord.
D) the vascular system.
E) blocks of muscle for movement.

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