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A student wrote that soap kills bacteria because fewer colonies appeared on a plate. Which additional control would most strengthen this conclusion?

Answer and explanation

Correct answer: Keep a plate treated identically but without soap

A no-soap control plate provides a baseline for natural growth. Identify a control made by removing only the treatment.

Related tags

Control PlateBacteriaSoapExperimental ControlHypothesis And ExperimentationExploration: Entering The World Of Secondary ScienceExploration Entering The World Of Secondary ScienceScience

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