Final answer:
Three traits that are diagnostic of anatomically modern Homo sapiens are a round, globular skull, reduced prognathism, and humanlike postcranial features.
Step-by-step explanation:
Three traits that are diagnostic of anatomically modern Homo sapiens are:
- Round, globular skull: Anatomically modern Homo sapiens have a skull shape that is round and globular, as opposed to the elongated skull shape seen in some earlier Homo species.
- Reduced prognathism: Anatomically modern Homo sapiens have reduced protrusion of the jaw (prognathism). Their jaws are smaller and less pronounced compared to earlier Homo species.
- Humanlike postcranial features: Anatomically modern Homo sapiens have postcranial features (skeletal elements below the skull) that resemble those of modern humans. This includes features such as the shape of the pelvis, limb proportions, and the presence of arches and ankles in the feet.