James took two pea plants, placing one in a dark closet and the other on a sunny window sill. both are located in air conditioned rooms. he then measured the growth of the pea plants after a week. in this experiment, the dark closet is a(n) a. independent variable b. control c. dependent variable d. constant
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James took two pea plants, placing one in a dark closet and the other on a sunny window sill. both a...
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