السؤال 33

A greenhouse grower wants a faster rate of photosynthesis from a tomato crop. Which changes would help? Select all that apply.

Fitting lamps to raise the light level on dull daysالإجابة الصحيحة
Heating the greenhouse towards the optimum temperatureالإجابة الصحيحة
Adding extra fertiliser to make the reaction itself run faster
Burning fuel to enrich the air with carbon dioxideالإجابة الصحيحة

الشرح

Each of the three requirements that set the rate can be raised inside a greenhouse, and lifting whichever one is currently scarce lets the reaction run faster, which is why commercial growers control all three together. Fertiliser is a different matter: mineral ions are needed for building new tissue, not for driving the sugar-making reaction itself.

الشرح

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