The 19th century saw attempts to change race from a taxonomic to a biological concept.

Like other psychological theories, they rely on a biological concept of the subject.

A biological concept doesn't even have to be true to make for good software.

I think the very fact that you are a software engineer shows a lack of understanding of biological concepts.

This approach is associated with scholars who question the validity of race as a biological concept.

Coevolution is primarily a biological concept, but has been applied to other fields by analogy.

Is health simply a biological concept, or is there more to it?

This definition explicitly ignores the biological concept of race, still subject to scientific debate.

The Council would call attention to the fact that the Northern stock is a biological concept.

In contrast to learning, natural selection is strictly a biological concept.