Which prefix is associated with the concept of life?

The prefix "bi/o" pertains to life and living organisms. It is derived from the Greek word "bios," which translates to life. This prefix is commonly used in medical terminology to form words that relate to living processes or biologically active substances, such as "biology" (the study of life) or "biopsy" (the examination of living tissue). Understanding this prefix is crucial in the medical field as it helps in identifying various conditions, studies, and procedures that involve living organisms or biological processes.

The other options represent different concepts: "bacteri/o" relates to bacteria, "azot/o" pertains to nitrogen levels in the body, and "balan/o" refers to the glans of the penis, none of which convey the concept of life directly. Therefore, "bi/o" is the only prefix among the choices that is explicitly connected to the idea of life.