Experiments with Aphids Have Shown That Phloem Sap

question 82

Multiple Choice

Experiments with aphids have shown that phloem sap

• A) does not require living cells.
• B) flows at a rate of about 10 cm per hour.
• C) is passively transported.
• D) is predominantly sucrose.
• E) requires a living aphid to draw it from the tree.

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Definitions:

Monopolistic Competition

A market structure characterized by many competitors selling products that are similar but not identical.

Pure Competition

A market structure characterized by a large number of sellers offering identical products, where no single seller can influence market prices.

Substitutes

Products or services that can serve as replacements for each other, fulfilling the same need or desire.

Market Segments

Groups of potential customers with similar needs, wants, and characteristics that a company targets with its products or services.