Describe what is meant by the term transpiration pull.

In a laboratory investigation, a student cut a plant stem underwater before placing the cut end into a beaker containing a red dye solution. Suggest why it is important to cut the stem underwater.

Suggest how the student could determine whether the red dye had traveled specifically through the xylem vessels of the cut stem.

A grower accidentally applied a concentrated fertilizer mixture to a greenhouse crop, making the mineral concentration of the soil water much higher than normal. Explain why the tomato plants began to wilt rapidly, even though the soil was thoroughly watered.

The grower proposed that treating the roots of healthy tomato plants with an inhibitor that prevents ATP synthesis in the root cells would lead to a similar wilting effect. Explain whether the grower's proposal is correct.

Explain why tomato plants growing in high light intensity require more water than plants growing in the shade, even when the ambient temperature and humidity are identical.