One Important Difference Between the C, N, and S Cycles

question 69

Multiple Choice

One important difference between the C, N, and S cycles and the P, Ca, and Si cycles is that

• A) P, Ca, and Si are NOT cycled in terrestrial environments.
• B) the P, Ca, and Si cycles do NOT involve redox changes or gaseous forms that can alter Earthʹs atmospheric chemistry.
• C) the P, Ca, and Si cycles do NOT involve microbial activity.
• D) the P, Ca, and Si cycles are NOT affected by global warming or other human activity.

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Definitions:

Variable Cost

Costs that vary directly with the level of production or sales, such as raw materials and labor.

Carrying Cost

The total cost of holding inventory, including storage, insurance, taxes, and depreciation.

Fixed Cost

Costs that do not vary with the volume of output produced, such as rent, salaries, and insurance premiums.

Inventory

The total amount of goods and/or materials contained in a store or factory at any given time.