Alcoholic fermentation forms fewer ATP molecules than cellular respiration
uses oxygen and ATP molecules as reactants
occurs in the muscle cells of animals and humans
gives off carbon dioxide and NADH as products

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yes it is   dangerous

explanation:

because that foot is discusting and could get you sick

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.