Practice question
Question
Water exchange between xylem and phloem occurs mainly at:
Explanation
Go with C — Source and sink regions. Under PSS- Sec-F-Transport, this is the standard explanation you’d use in class: it names the real driver or definition, while the rest are nearby but wrong. Not these: A) Roots only; B) Leaves only; D) Stem nodes. When two options sound similar, choose the one that matches the textbook definition most tightly.
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