Question

which of the following is not an ancestral characteristic of primates? a collar bone five digits on hands and feet plantigrade locomotion stereoscopic vision

Explanation:

Primates have a collar - bone (clavicle), five digits on hands and feet, and stereoscopic vision as ancestral traits. Plantigrade locomotion (walking on the soles of the feet) is not a universal ancestral characteristic of primates. Some primates are arboreal and have different locomotion patterns.

Answer:

C. Plantigrade locomotion