Valleys are one of the most common landforms on the surface of the planet. They are carved by flowing water or flowing ice through the process of erosion, which is the gradual wearing away of Earth surfaces through the action of wind and water.
The cellular respiration processes of all living cells make use of the coenzyme Nicotinamide adenine dinucleotide (NAD). It plays a key role in energy metabolism by accepting and donating electrons.
THIAMIN-B1 Chief Functions in the Body: Part of the coenzyme TPP(thiamin pryophosphate) used in energy metabolism. RIBOFLAVIN-B2 Chief Functions in the Body: Part of coenzymes FMN(flavin mononucleotide) and FAD(flavin adenine dinucleotide) used in energy metabolism.