HOSA Biotechnology Practice Test 2025 – Complete Exam Prep Guide

The term that refers to the functions of living organisms is physiology. Physiology encompasses the study of how organisms, organs, and cells function, including processes such as respiration, digestion, and circulation. It looks into how various systems work together to maintain homeostasis and support life.

On the other hand, structure refers to the physical composition of organisms or their parts, such as tissues and organs, rather than their functions. Biochemistry, while related, focuses more on the chemical processes and substances within living organisms rather than their overall functions. Genetics deals with heredity and the variation of traits in organisms, emphasizing the molecular and hereditary aspects rather than the functional dynamics. Thus, physiology is the most encompassing term for describing the functions of living organisms.