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.
Soil salinity is the salt content in the soil; the process of increasing the salt content is known as salinization.Salts occur naturally within soils and water. Salination can be caused by natural processes such as mineral weathering or by the gradual withdrawal of an ocean.s soil salinity increases, salt effects can result in degradation of soils and vegetation. Salinization as a process can result from: 1  high levels of salt in water. 2  landscape features that allow salts to become mobile (movement of water table).