What are bacteria classified as?

Bacteria are classified as single-celled, living microorganisms because they are made up of a single cell that carries out all the necessary functions for life, such as metabolism and reproduction. They reproduce asexually through processes like binary fission, where one cell divides into two identical cells. This classification as living organisms is essential in the context of food safety, as it helps us understand how they can multiply in food, potentially leading to foodborne illnesses.

In contrast, options that regard bacteria as non-living microorganisms or enzymes misrepresent their biological nature. Bacteria are neither multicellular (as seen in fungi) nor simply enzymes, which are proteins that catalyze reactions but do not exhibit characteristics of life. Understanding bacteria's classification helps in implementing proper food handling practices to prevent food contamination and ensure safety in food service.