Respiration

question 90

Multiple Choice

Respiration:

• A)occurs only when the Sun is shining.
• B)releases oxygen into the air.
• C)must give off less carbon than is fixed through photosynthesis if a plant is to experience net growth.
• D)does not affect the concentration of carbon dioxide in the atmosphere.

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Definitions:

Labor

The human effort, including physical and mental efforts, used in the production of goods and services.

Average Total Cost Curve

A graphical representation showing a firm's total costs divided by output at various levels of production.

Output Levels

Refers to the amount of goods or services produced by a company, industry, or economy at a given time.

Rises

An increase, elevation, or improvement in position, level, or condition.