_ is a potentially lethal pathogen that can cause surgical site infection and can spread radially and cause anaerobic cellulitis and tissue necrosis (death).

what tree

explanation:

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.