Final answer:
People have historically assumed that calling an ethnic group a 'race' has biological significance, but race is a socially constructed category and does not accurately reflect human biological variation.
Step-by-step explanation:
Historically, people have made the assumption that calling an ethnic group a 'race' implies a biological significance. However, the concept of race is not scientifically valid and does not accurately reflect human biological variation. Race is a socially constructed category that has been used as a tool for discrimination and subordination. While race is not biologically meaningful, it continues to have significant social implications.