What Drives the Flow of Water Through the Xylem

question 38

Multiple Choice

What drives the flow of water through the xylem?

• A) passive transport by the endodermis
• B) the evaporation of water from the leaves
• C) active transport by parenchyma cells within xylem tissue
• D) the number of companion cells in the phloem
• E) active transport by tracheid and vessel elements

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