When the Stomata in a Leaf Close During the Day

question 17

Multiple Choice

When the stomata in a leaf close during the day, then

• A) carbon dioxide in the air spaces in the leaf decreases.
• B) oxygen in the air spaces in the leaf increases.
• C) C₃ plants carry on photorespiration, using O₂ and producing PGA and CO₂.
• D) all photosystems as well as photorespiration come to a halt.
• E) All choices but the halting of photosystems are correct.

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Definitions:

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The difference between the retail price and the cost of an item to the retailer, maintained as a percentage of the retail price.

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A reduction from the original or list price of a product, usually to boost sales or clear inventory.