WAEC Biology 1995 Question 36

The graphs below show the results of experiments which investigated the effect of temperature and oxygen on the rate of uptake of certain ions labelled X and Y by a plant root. Use them to answer questions 36 and 37
Which of the following conclusions cannot be drawn from the graphs?

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