Bacteria are usually identified by using standard molecular biology procedures, being the Polymerase Chain Reaction (PCR) the most widely used technique for this purpose. The identification by PCR consists of the amplification and visualization of specific DNA sequences that can be obtained from different individuals, strains, species, etc. However, it is also possible to identify bacteria with a microscope, i.e., by observing taxonomical characteristics that allow to differentiate specific bacteria.
When elements and compounds that are dissolved in water leave a solution, crystallization occurs. Minerals form in this way underground & in bodies of water.
