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Answer to Question #67844 in Cell Biology for Tiyane

Question #67844

(a) A leafy shoot can be sealed inside a transparent container. The concentration of oxygen in the atmosphere within this container can be measured. In the dark, the oxygen concentration falls. At high light intensities, the oxygen concentration increases. At a particular light intensity, the oxygen concentration in the container remains constant.
Use the figure above to explain how it is possible for the oxygen concentration to remain constant.
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Expert's answer
Plant produces oxygen during photosynthesis and use it during aerobic respiration. The equillibrium for these processes is dependent on the amount of light. Under certain light intensity, the amount of oxygen produced is equal to the amount consumed. It is the critical point of photosynthesis.

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