Photosynthesis

1) A group of students investigated the effect of carbon dioxide and light intensity on the photosynthetic rates of ivy leaves. The graph below shows the results of the experiment. Give the word equation for photosynthesis 2 Marks

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2) Describe and explain the effect of increasing carbon dioxide concentration on the photosynthetic rate at low light intensity, in relation to the influence of limiting factors 3 Marks

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3) To collect the data for high light intensity, the students needed to place a lamp very close to the leaves. The lamp can sometimes become very hot, explain why the students needed to ensure that this did not happen 4 Marks

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4) Ivy leaves are variegated, meaning that they have white and green coloured regions. Green regions of the leaves only were used to produce the graph above. Explain the effect on oxygen concentration if white regions of the leaves had been used instead 2 Marks

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5) Discuss how a leaf can be adapted to maximise photosynthesis 5 Marks

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