Stephanie wants to do an investigation about the effect of light on the growth of bean seedlings. which of the following is the best experimental procedure for stephanie to follow? a. she should grow ten bean seedlings in a lighted area. b. she should grow ten bean seedlings in a dark area. c. she should grow five bean seedlings in a lighted area and five green onion seedlings in a dark area. d. she should grow five bean seedlings in a lighted area and five bean seedlings in a dark area.
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