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American Water Works Water Treatment Plant Operator (WTPO) Practice Test

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The study of living things is called
Correct Answer:
Biology
Explanation:
Biology is the study of living things—how they grow, reproduce, carry out life processes, and interact with one another. It covers everything from cells and metabolism to genetics and development, which is why it’s the correct choice. Ecology, while related, focuses on relationships and interactions within ecosystems. Physics deals with matter, energy, and the forces that govern them, and chemistry looks at the composition and reactions of substances. In water treatment, understanding biology helps explain how microbes and other organisms behave and respond to treatment, but the fundamental study of living things is biology.

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