Final answer:
Biological anthropologists acquire knowledge through the scientific method and by studying various aspects of human biology.
Step-by-step explanation:
Biological anthropology is a field that focuses on studying the origins, evolution, and diversity of human beings. Biological anthropologists acquire knowledge through the scientific method, which involves forming research questions, constructing testable hypotheses, gathering and analyzing data, and drawing conclusions based on the results. They use various methods such as genetic analysis, study of fossilized remains, and examination of contemporary human populations to understand human biology and behavior.