APFIVE In an effort to demonstrate the effects of wind on transpiration rates in plants, a student set up an experiment with two identical potted plants. One plant was placed in a wind tunnel with a fan generating constant airflow, while the other was kept in still air. The student measured the soil moisture levels of both pots and found no significant difference after several days. The student expected the plant in the wind tunnel to show higher transpiration rates and lower soil moisture. What was the conceptual mistake in the student’s experimental design?
The humidity in the wind tunnel was too high, counteracting the expected increase in transpiration due to wind exposure.
The student did not account for the fact that transpiration is primarily driven by the plant’s stomatal opening, which may not have been affected by the wind in the short term.
The soil in both pots was too compact, reducing the rate of water uptake by the plants and thus minimizing the effect of wind on transpiration.
The fan in the wind tunnel was set to a low speed, not creating enough airflow to significantly increase transpiration rates.
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