OAE Biology Practice Questions - Ohio Assessments For Educators Biology (007) Exam

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In an experiment testing whether nitrogen fertilizer affects bean plant growth, which setup best identifies nitrogen availability as the independent variable?

Several groups receive different nitrogen concentrations while light, water, soil type, and temperature are kept constant One group receives more light and more nitrogen while another receives less water All plants receive the same fertilizer and are measured at the end of the month Plants are grown outdoors without recording rainfall or temperature

Correct Answer:

Several groups receive different nitrogen concentrations while light, water, soil type, and temperature are kept constant

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