A microorganism (or microbe) is any microscopic living organism or virus, that is too small to see with the unaided human eye without magnification. Microorganisms are very diverse. They can be single-celled or multicellular and include bacteria, archaea, viruses and most protozoa, as well as some fungi, algae, and animals, such as rotifers and copepods. Many macroscopic animals and plants have microscopic juvenile stages. Some microbiologists also classify biologically active entities such as viruses and viroids as microorganisms, but others consider these as non-living.
I believe that the reason for using taq polymerase for pcr is that; it is heat stable and can withstand the temperature changes of the cycler. Taq polymerase is isolated from a heat loving bacterium that is naturally found in hot springs, so the enzyme doesn't break down at the high temperatures necessary for copying DNA using a polymerase chain reaction. At high temperatures, Taq polymerase attaches nucleotides to a DNA template, thereby copying the DNA.
<h3>Hazard means danger</h3>
From what i remember, it lets the topsoil regain needed nutrients for the next crop without drying up the field of the needed nutrients
