Final answer:
Physical anthropology was associated with the measurement and classification of skulls according to racial characteristics. However, the focus shifted to the study of human evolution and the evolutionary process.
Step-by-step explanation:
For much of its early history, physical anthropology was associated with the measurement and classification of skulls according to racial characteristics. This involved studying the physical morphology (shape and size) of skulls to form hypotheses about human evolution. However, in the 1930s, the focus of physical anthropology shifted to the study of human evolution and the evolutionary process, including paleoanthropology and primatology.