A megahertz is one million (or 106) hertz. See hertz, kilohertz (one thousand hertz), gigahertz[?] (109 hertz), terahertz[?] (1012 hertz), and petahertz[?] (1015 hertz).
... In animal bodies, this is exactly reversed: oxygen plus sugar yields carbon dioxide plus water plus energy. However, it is important to note that this chemical equation is ...