Multiple Choice
If a plant does not have enough water, which of the following is most likely to occur as a result of changes in water potential?
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34. Vascular Plant Transport
Water Potential
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In most terrestrial plants, the majority of water taken up by the roots is ultimately used for which process?
A
Long-term storage in vacuoles to increase turgor pressure
B
Transpiration through stomata as water vapor
C
Conversion into ATP during cellular respiration
D
Incorporation into carbohydrates during photosynthesis
Verified step by step guidance1
Identify the main processes in terrestrial plants that involve water uptake by roots: water can be used for photosynthesis, cellular respiration, storage, or transpiration.
Understand that water is essential for photosynthesis, but only a small fraction of the water taken up is actually incorporated into carbohydrates; most water is not converted into organic molecules.
Recognize that cellular respiration uses glucose and oxygen to produce ATP, but water is a byproduct rather than a major input, so water is not primarily used for ATP production.
Consider the role of vacuoles in plant cells: they store water to maintain turgor pressure, but this storage is not the main fate of the majority of water absorbed by roots.
Recall that transpiration is the process where water evaporates from the stomata of leaves, creating a pull that draws water upward from the roots through the xylem; this accounts for the majority of water movement and use in terrestrial plants.
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