39. The conversion of pyruvic acid into lactic acid requires

a. alcohol.

c. ATP.

b. oxygen.

d. NADH.

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The membrane in the ear is named for what musical instrument

The earths core is made up mainly of what 2 substances? 2. Like an egg, Earth has a core, a layer surrounding the core, and a thin, hard outer layer. Which layers of the earth match the layers of an egg?

Pyruvic acid is the final product of glycolysis, which is the first stage of cellular respiration. Why is pyruvic acid never the end product of fermentation.

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What is the purpose of the tympanic membrane