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Gravity potential in a standing plant has which character?
AAlways positive, and adds energy to the water
BAlways negative to zero, and removes energy
CAlways positive, and is set by the plant itself
DAlways negative, and is set by the plant itself
Answer & Solution
Correct answer: B. Always negative to zero, and removes energy
1. Gravity potential is always negative to zero in a plant with no height.
2. It always removes or consumes potential energy from the system.
3. Gravity pulls water downwards to the soil, reducing the potential energy of the water in the plant.
4. The taller the plant, the taller the water column, and the more influential this component becomes.
5. Plants are unable to manipulate gravity potential, so the options that make it plant controlled are wrong.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 30 "Plant Form and Physiology", section 30.5 Transport of Water and Solutes in Plants_
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