Final answer:
If racial distinctions were considered natural biological categories, it would contradict the scientific evidence that race is a social construct.
Step-by-step explanation:
Biological anthropology has shown that there is no scientifically valid way to divide the human population into racial categories. Each human trait varies along a spectrum, and the traits are mixed and matched among individuals in ways that make racial distinctions inaccurate. Skin color, for example, varies along a spectrum, from pinkish beige to dark brown, with people having skin of every shade between. If racial distinctions were to be considered natural biological categories, it would greatly impact anthropological perspectives on race as it would contradict the scientific evidence that race is a social construct rather than a biological fact.