2.40B Diffusion in plant gas exchange
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By which process do gases move into and out of a leaf?
(1)Total for this question: 1 mark
2(g) GAS EXCHANGE · EXAM QUESTIONS
2.40B Diffusion in plant gas exchange
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2.40B Diffusion in plant gas exchange
Exam question
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Explain how carbon dioxide reaches the palisade cells from the air.
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Total for this question: 2 marks
2.40B Diffusion in plant gas exchange
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Explain why carbon dioxide diffuses into a leaf during the day.
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Total for this question: 2 marks
2.40B Diffusion in plant gas exchange
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Explain why oxygen diffuses out of a leaf in bright light.
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Total for this question: 2 marks
2.40B Diffusion in plant gas exchange
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Describe the route taken by an oxygen molecule leaving a palisade cell.
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Total for this question: 2 marks
2.40B Diffusion in plant gas exchange
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State why plants do not need ventilation like mammals.
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Total for this question: 1 mark
2.40B Diffusion in plant gas exchange
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Suggest why gases diffuse more quickly into thin leaves than thick leaves.
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Total for this question: 2 marks
2.40B Diffusion in plant gas exchange
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Explain why the air spaces in the spongy layer are important for gas exchange.
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Total for this question: 2 marks
2.40B Diffusion in plant gas exchange
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Explain why the leaf surfaces of a plant are kept moist inside the leaf.
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Total for this question: 2 marks
2.40B Diffusion in plant gas exchange
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Explain why gas exchange in leaves continues at night.
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Total for this question: 2 marks