Measurements of the Diameter of a Plant Stem During a Long

question 39

Multiple Choice

Measurements of the diameter of a plant stem during a long drought show a gradual decrease in diameter over time and then a sudden return to almost its original diameter, even as the drought continues. Which of the following hypotheses is the MOST likely explanation for the increase in stem diameter?

• A)Water flow from the soil increased due to the use of ATP to drive the selective uptake of nutrients, leading to water uptake by osmosis.
• B)Water flow from the soil increased due to greater stomatal opening.
• C)Air entry and cavitation released the tension in the stem xylem.
• D)Redistribution of water from the leaves swelled the stem xylem.

---

Definitions:

Certificate

A document serving as proof or evidence of ownership or entitlement, such as a certificate of stock, birth certificate, or certificate of completion.

General Partner

A partner in a partnership who has unlimited personal liability for the debts of the business and takes part in its day-to-day management.

Limited Partnership

A business structure where one or more partners have limited liability and are not involved in the day-to-day management, juxtaposed with at least one general partner who has unlimited liability.

RULPA

The Revised Uniform Limited Partnership Act, which is a statute that governs limited partnerships in the states that have enacted it.