Which of the following conclusions
cannot be drawn from the graphs?

A. Ion is taken up more rapidly at suitable temperature
B. Suitable oxygen concentration increases ion uptake
C. Ion uptake requires energy from aerobic respiration of sugar
D. Ion uptake occurs most rapidly in adequate supply of, respiratory substrate
E. The quantity of ions absorbed is inversely proportional to the quantity of carbohydrate (sugar) synthesized.  

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Correct Answer: E