Anita conducted an experiment to examine photosynthesis in aquatic plants kept in a tank by measuring dissolved oxygen. She plotted her results in the following graph X: She repeated the experiment while covering the tank with an opaque black cloth. She plotted the results in the following graph Y: (a) What could be the aim of her experiment? (b) Apart from photosynthesis, what other cellular process can be observed by the experiment? (c) Why does the oxygen level rise in graph X? (d) Explain the downward slope of the graph Y.

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CASE_STUDIESPhotosynthesis Process in PlantsCellular Respiration Process4 sub-questions

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