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.
A. The composition of seawater can be divided into suspended (also called particulate) and dissolved materials. B. Salinity is the term used to describe the concentration of inorganic, dissolved salts in seawater. 1. Unit = ppt or o/oo (per mil) by weight.