In order to survive, all the cells in your body need energy. ... To provide this energy, your cells must break down the glucose in your food during a process called glycolysis and convert it into pyruvate<span>, sometimes called pyruvic acid, and the molecule that feeds the Krebs cycle, our second step in </span>cellular respiration<span>.</span>
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food chain- description 3
energy losses- description 5
pyramid of biomass- description 1
pyramid of numbers- description 4
energy flow- description 2
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1a
2a
3b
4a
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