What bacteria did we talk about that has a vaccine against it? a) staph b) tetanus c) salmonella d) mrsa

the cell is the smallest structural and functional unit of living organisms, which can exist on its own. therefore, it is sometimes called the building block of life. some organisms, such as bacteria or yeast, are unicellular—consisting only of a single cell—while others, for instance, mammalians, are multicellular.