Practice question

MCQ

Question

Water exchange between xylem and phloem occurs mainly at:

Options

Choose one · Correct answer highlighted

Roots only Leaves only Source and sink regions Correct Stem nodes

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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