How Can Researchers Confirm That Phloem Moves from a Source

question 44

Multiple Choice

How can researchers confirm that phloem moves from a source to a sink?

• A)They can observe aphids and cut off their beaks.
• B)They can study the cause of maple sap flow in producing syrup.
• C)They can observe the effects of girdling a tree below the level of the majority of leaves.
• D)They can use radioactive tracers to measure the flow of sap between two distances over time.
• E)They can observe the uptake of ink into the stem of celery.

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Definitions:

Voluntary Participation

The principle that individuals choose to participate in an activity or research without coercion.

Operationalization Process

The procedure of defining the measurement of a phenomenon that is not directly measurable, by aligning it with an observable operation, quality, or quantity.

Concepts

Fundamental ideas or categories that help to organize thought and serve as the building blocks for more complex theories or knowledge.

Variables

Elements or features that can vary or change within a study, experiment, or statistical analysis, impacting the outcome or results.