character: Biology Textbook
topic: pH and Its Importance in Biological Systems
grade: 11
subject: Biology
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character: Water Molecule
topic: Chemical Properties of Water
grade: 11
subject: Biology
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character: Cell Biology Chapter
topic: Water's Role in Cellular Processes
grade: 11
subject: Biology
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character: Ecology Module
topic: pH Impact on Aquatic Ecosystems
grade: 11
subject: Biology
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