What do most bacteria and fungi eat in common?

Bacteria and fungi are two large kingdoms of living organisms. By the type of nutrition, most representatives of these systematic groups are heterotrophs, i.e. consume ready-made organic matter. They are not able to synthesize the necessary elements themselves from inorganic ones by photosynthesis (like phototrophs) or chemical reactions (chemotrophs). Fungi and bacteria must constantly absorb food for food. Both those and others have stages of energy metabolism, only bacteria have two of these stages, and fungi have three, i.e. they are able to break down the received food and store the released energy in ATP molecules. Often, fungi and bacteria are saprophytes – organisms that decompose dead organic matter and supply the soil with minerals (this process is called mineralization). Therefore, fungi and bacteria can be in the trophic chain at the same position – at the end of the chain in the form of reducers.