Answer:
A. Bacteria.
Explanation:
That was why penicillin was manufactured, because doctors believed bacteria was a major cause of diseases.
Hope it helps.
True, The kingdom miners include viruses
Aerobic respiration<span>, a process that uses oxygen, and </span>anaerobic respiration, a process thatdoesn't<span> use oxygen, are two forms of cellular respiration. Although some cells may engage in just one type of respiration, most cells use both types, depending on an organism's needs. Cellular respiration also occurs outside of macro-organisms, as chemical processes — for example, in fermentation. In general, respiration is used to eliminate waste products and generate energy.</span>
