Water moves up the xylem as a continuous column mainly because of

  1. osmosis in the leaves only
  2. active transport into xylem vessels
  3. cohesion between water molecules caused by hydrogen bonds
  4. translocation
Answer

C) cohesion between water molecules caused by hydrogen bonds

Cohesion–tension. AS & A Level Biology · Topic 7 Transport in Plants · 7.2 Transport mechanisms

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