Biology 9700 · AS & A Level · Structure of transport tissues

Structure of transport tissues — practice question

What structural feature of xylem vessel elements enables them to remain open as the rate of transpiration rises?

  • Anew vessel elements carry extra water as a plant grows
  • Bthere are no cross walls between vessel elements
  • Cvessel elements form narrow tubes
  • Dwalls of vessel elements contain lignin

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