In biology, a mutation is a permanent change of the nucleotide sequence of the genome of an organism, virus, or extrachromosomal DNA or other genetic elements.
Salinity is the saltiness or dissolved salt content of a body of water (see also soil salinity).onceptually the salinity is the quantity of dissolved salt content of the water. Salts are compounds like sodium chloride, magnesium sulfate, potassium nitrate, and sodium bicarbonate which dissolve into ions.
Water salinity diagram. Saline water is water that contains a significant concentration of dissolved salts (mainly NaCl) and is commonly known as salt water. The salt concentration is usually expressed in parts per thousand (permille, â°) or parts per million (ppm).ater salinity diagram. Saline water is water that contains a significant concentration of dissolved salts (mainly NaCl) and is commonly known as salt water. The salt concentration is usually expressed in parts per thousand (permille, â°) or parts per million (ppm).