Water Potential

How does water potential affect the movement of water in plants?

• Water potential has no effect on the movement of water in plants.

• Water potential determines the direction and rate of water flow in plants through osmosis.

• Water potential causes water to move against the concentration gradient in plants.

• Water potential only affects the movement of water in animals, not plants.

What is a water potential gradient?

• The process of water evaporating from a surface.

• The measurement of the amount of water in a system.

• The difference in water potential between two points in a system.

• The movement of water from an area of low water potential to an area of high water potential.

How does solute potential affect water potential?

• Decreases water potential

• Causes water potential to fluctuate

• Has no effect on water potential

• Increases water potential

How does turgor pressure affect plant cells?

• Turgor pressure has no effect on plant cells

• Turgor pressure causes plant cells to expand indefinitely

• Turgor pressure causes plant cells to shrink

• Turgor pressure affects plant cells by maintaining their shape and rigidity when the cell is fully hydrated, and causing them to wilt when the cell loses water.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Which process involves the movement of water molecules from an area of higher water potential to an area of lower water potential?

• diffusion

• active transport

• filtration

• osmosis

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NGSS.MS-LS1-2

How does solute concentration affect water potential?

• Causes water potential to fluctuate

• Increases water potential

• Decreases water potential

• Has no effect on water potential

What are the two main units of measurement for water potential?

• liters (L)

• bars

• degrees Celsius (°C)

• megapascals (MPa)

What is the definition of water potential in the context of plant physiology?

• The potential energy of water in a system compared to pure water, when temperature and pressure are equal.

• The amount of water vapor in the air compared to the maximum amount the air can hold.

• The rate at which water evaporates from a plant's surface.

• The concentration of solutes in a plant's cytoplasm.

Which factor does NOT affect water potential in plants?

• Solute concentration

• Pressure

• Temperature

• Color of the plant

In an experiment, a plant cell is placed in a solution with a higher water potential than the cell. What is the expected outcome?

• The cell will gain water and become turgid.

• The cell will lose water and become plasmolyzed.

• The cell will remain unchanged.

• The cell will burst due to excessive water intake.