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GCSE Biology Paper 1 (9-1 Exams)

Water Transpiration Roots Plant Leaf Drawn Describe Process

The process of the transpiration stream involves water evaporating from leaves, creating a pull that draws more water up from the roots, maintaining a constant flow.

Le processus du flux de transpiration implique que l'eau s'évapore des feuilles, créant une tension qui tire plus d'eau des racines, maintenant un flux constant.

Front Describe the process of the transpiration stream. OR
Explain how water is transported from the roots of a plant to its leaves.
Back
  1. Water from inside a leaf evaporates and diffuses out of the leaf, mainly through the stomata
  2. This creates a shortage of water in the leaf, so more water is drawn up from the rest of the plant through xylem vessels to replace it.
  3. This in turn means more water is drawn up from the roots and so there is a constant transpiration stream of water through the plant.

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