Question

What key anatomical change accompanied the development of erect posture in human evolution?

Options

• Lengthening of forelimbs

• Flattening of the spine

• Development of lumbar curvature and broadening of pelvic girdle

• Shortening of hind limbs

Answer 1

The development of lumbar curvature and broadening of the pelvic girdle were key anatomical changes that accompanied erect posture. These structural modifications provided support and weight distribution for an upright-walking body, enabling efficient bipedal locomotion.