In What Way Does the Transportation of Phloem Sap Require

question 49

Multiple Choice

In what way does the transportation of phloem sap require metabolic energy?

• A) Active transport is necessary to transport sucrose against the concentration gradient at the sink.
• B) The flow of water from the xylem into the phloem tube requires active transport.
• C) The positive pressure potential (pushing from the source) requires ATP.
• D) The flow of sucrose between sieve tubes requires active transport.
• E) Drawing water from the xylem requires facilitated transport (i.e., ATP).

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