I want to know the answer to the following question:
Who taught and accepted the belief that biologically distinct races were isomorphic?
All the background I'm provided with is that "In the early 20th century, many anthropologists accepted and taught the belief that biologically distinct races were isomorphic with distinct linguistic, cultural, and social groups, while popularly applying that belief to the field of eugenics, in conjunction with a practice that is now called scientific racism.". Is that enough to answer the question?
Answer: yes