Why are bacteria secreted into an independent kingdom of the organic world?

1) All bacteria are non-nuclear single-celled organisms.
2) All bacteria contain one circular DNA molecule located in the nucleoid.
3) Bacterial cells lack the membrane organoids present in eukaryotic organisms (mitochondria, lysosomes, Golgi apparatus, 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.