The habitat of the bacteria.

The bacteria are ubiquitous. They are unpretentious to environmental conditions and can live deep underground, at the bottom of the oceans, in the thickness of millennial glaciers and even in space. Such adaptations have allowed bacteria to survive natural disasters that have occurred on earth for thousands of years. Many types of bacteria have adapted to survive in animals, hide from the immune system, and even be beneficial. Many strains are causative agents of human and plant diseases.