A unifying feature of vertebrates is that their embryos are segmented. What feature of human anatomy reflects this primitive segmentation?
A. The symmetry of the body
B. The division of the trunk region into a thorax and an abdomen
C. The arrangement of the teeth in rows
D. The presence of two forelimbs and two hindlimbs
E. The linear arrangement of the ribs and vertebrae
Answer: E
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