The rotation of air around a high-pressure center is called a(n)

The coriolis force caused by the Earth's rotation is what gives winds within high-pressure systems their clockwise circulation in the northern hemisphere (as the wind moves outward and is deflected right from the center of high pressure) and counterclockwise circulation in the Southern Hemisphere. (Hope the helps you out!) :)

Giga is the second highest prefix on the normal scale, the first is terra.

Amutation is basically the change in the gene, caused by alteration of single based units in the dna, or the genes or chromosomes were rearranged in the dna