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.
Anyone who has ever tasted seawater knows that it is truly salty. The salty residue left on swimsuits after theyve been in the ocean is further evidence of the oceans salinity. Salinity is a measure of how much salt is dissolved in water.The average salinity of seawater for all Earths oceans is about 35 grams of dissolved salts per kilogram of seawater. This is shown as 35 parts per thousand, or 35.he salty residue left on swimsuits after theyve been in the ocean is further evidence of the oceans salinity. Salinity is a measure of how much salt is dissolved in water. The average salinity of seawater for all Earths oceans is about 35 grams of dissolved salts per kilogram of seawater.