The Most Important Ion in Controlling the Movement of Water

question 6

Multiple Choice

The most important ion in controlling the movement of water into and out of the guard cells is

• A)sodium.
• B)hydrogen.
• C)carbon.
• D)nitrogen.
• E)potassium.

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Definitions:

Total Fixed Cost

The sum of all costs that remain constant regardless of the level of production or output.

Total Cost

The complete cost of producing a certain amount of output, including both fixed and variable costs.

Quantity

The amount or number of a material or immaterial thing not usually estimated by spatial measurement.

Average Total Cost

The total cost of production (fixed plus variable costs) divided by the quantity of output produced.