1 Printing Inks are NOT opaque! They are slightly translucent, which means the color of the paper effects the color. So PANTONE Blue 072 looks one way on white paper, but on natural, off-white, or colored papers it would pick up some of the color of the paper.  Transparent White is NOT white ink....
Anaerobic respiration occurs in the absence of oxygen, unlike aerobic respiration. Some organisms such as certain types of bacteria carry out anaerobic respiration as the main or only kind of respiration, while other organisms such as ourselves only carry out anaerobic respiration under special circumstances.
Depending upon the organism, fermentation can occur in the presence (aerobic) and/or in the absence (anaerobic) of oxygen. Fermentation pathways produce byproducts such as carbon dioxide, ethanol (alcohol), or organic acids (lactic acid or acetic acid, for example).lcohol fermentation is often used in bacteria in anaerobic conditions as well as in yeast. Interestingly, the carbon dioxide that is released in alcohol fermentation generated by a baker's yeast is what allows the bread to rise!