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In which question is the number of plant leaves the dependent variable?

Answer and explanation

Correct answer: How does the duration of light affect the number of leaves on a plant?

A dependent variable is the outcome that is measured or observed in an experiment. In option C, the duration of light is changed and the number of leaves on the plant is measured, so leaf number is the dependent variable. In option D, leaf colour—not leaf number—is the dependent variable. Exam tip: In a question asking “how does X affect Y?”, Y is usually the dependent variable.

Related tags

Dependent VariablePlant ExperimentLeaf NumberLight DurationScientific ObservationScientific Questions And ObservationsExploration: Entering The World Of Secondary ScienceExploration Entering The World Of Secondary Science

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