ILTS Science Biology (239) Practice Questions - ILTS Science Biology (239) Test Exam

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A biology teacher wants students to design an experiment testing whether light intensity affects the rate of photosynthesis in elodea. Which variable should students intentionally change to serve as the independent variable?

The intensity of light reaching the plant The number of oxygen bubbles produced The temperature of the water The species of aquatic plant used

Correct Answer:

The intensity of light reaching the plant

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