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Biological concepts Ch.9 (15) - Experiment and Exercise of gas exchange

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Biological concepts Ch.9 (14) - Figure showing Net uptake and release of gas exchange

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Biological concepts Ch.9 (13) - Net uptake and release of gas exchange

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Biological concepts Ch.9 (12) - Gas exchange in stems and roots

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Biological concepts Ch.9 (11) - Distribution of stomata in leaves

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