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Why should the number of seeds be the same in each group of a germination experiment?

Answer and explanation

Correct answer: So that germination percentages can be compared fairly

Keeping the same number of seeds in every group makes the comparison of germination percentages fair. If one group has more seeds, comparing only the total number germinated can give a misleading result. The number of seeds is a controlled variable, so the effect of the independent variable can be tested more reliably. Exam tip: In a fair test, keep sample size and other conditions the same.

Related tags

Germination ExperimentControlled VariablesFair TestSample SizeIndependent VariableVariables In An ExperimentExploration: Entering The World Of Secondary ScienceExploration Entering The World Of Secondary Science

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