The evolution of vertebrates
a. is believed to have proceeded from cephalochordates
b. is most closely tied to urochordates
c. is most closely tied to hemichordates
d. is probably in a lineage apart from present-day invertebrate chordates
e. possibly proceeded from cephalochordates through hemichordates
Ans: is probably in a lineage apart from present-day invertebrate chordates
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