In bipeds, the lumbar vertebrae are enlarged in order to __________.
A) more effectively bear weight
B) provide a strong anchor for the upper legs
C) enlarge the birth canal in females
D) correct for balance problems

Question

Quizplus · Accepted Answer

The lumbar vertebrae are enlarged in bipeds in order to more effectively bear weight. As humans stand and walk upright, the lumbar vertebrae must support the entire weight of the upper body, leading to the evolution of larger lumbar vertebrae in bipeds.

In Bipeds, the Lumbar Vertebrae Are Enlarged in Order to __________