One change necessary to the vertebral column for bipeds is __________.
A) denser bone material in vertebrae
B) an S-shaped curvature
C) a straightening of the vertebral column
D) a complete reconfiguration of muscle attachments

Question

Quizplus · Accepted Answer

An S-shaped curvature allows for the weight of the upper body to be balanced over the pelvis, which is necessary for bipedalism. In contrast, a straight vertebral column would not distribute weight evenly and could lead to balance issues and back strain. Denser bone material and muscle attachment reconfiguration may also have played a role in the evolution of bipedalism but are not the primary change necessary in the vertebral column.

One Change Necessary to the Vertebral Column for Bipeds Is