When considering the structure of bacteria, it’s important to note that bacteria are unicellular organisms. This means that each bacterium consists of a single cell. Therefore, the correct answer to how many cells bacteria have is:
A: One
Bacteria are the simplest form of life and function as individual cells. They are made up of various components such as a cell wall, cell membrane, ribosomes, and genetic material, all contained within a single cell. Unlike multicellular organisms, bacteria do not have specialized tissues or cells, so each bacterium operates as a complete and independent unit.