What is the role of bacteria in the circulation of substances?

1) heterotroph bacteria – reducers decompose organic substances to minerals, which are absorbed by plants;
2) bacteria-autotrophs (photos, chemotrophs) – producers synthesize organic substances from inorganic, providing a cycle of oxygen, carbon, nitrogen, etc.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.