Explain why a source of nitrogen is added to the fermenter
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Nitrogen is essential to yeast growth and yeast metabolism. In winemaking, YAN plays a key role at two different levels: It represents an important nutritional factor for yeasts during alcoholic fermentation due to its function in protein synthesis and sugar transport.

uh two lol

lizards have adapted to life in the desert. some desert lizards have toes with spiny scales to them run across the sand without sinking. some use the sand to hide from predators, or to search for small animals that they prey upon.