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.
8. These days salinity is measured by measuring the electrical conductivity of a seawater sample. The conductivity is directly proportional to the content of dissolved salts and can be, therefore, parlayed into a salinity determination. 9. When seawater evaporates or is diluted by precipitation, only the proportion of H2O changes so the proportions of these salts are unchanged.