CAM Plants, Such as Cacti and Agaves, Use a Different

question 60

Multiple Choice

CAM plants, such as cacti and agaves, use a different carbon-fixing pathway than most other plants, allowing them to ____.

• A)keep their stomata open all day and night to increase the efficiency of photosynthesis
• B)keep their stomata closed all day and night to decrease the amount of CO₂ absorbed
• C)open their stomata only during the day to increase the amount of CO₂ absorbed
• D)close their stomata only at night to reduce the amount of water lost to evaporation
• E)open their stomata only at night to reduce the amount of water lost to evaporation

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Definitions:

Producer Surplus

The difference between the amount producers are willing to sell a good for and the actual amount they receive, usually represented graphically as the area above the supply curve and below the market price.

Consumer Surplus

The differential between the amount envisioned by consumers to pay for a good or service and the actual amount paid.

Perfectly Competitive

A market structure characterized by many buyers and sellers, free entry and exit, and a homogeneous product.

Consumer Surplus

The distinction between the ideal payment by consumers for a product or service and the financial outlay they make.