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6 marksThe Uptake and Transport of Water and Minerals

CAPE Biology Unit 2 · 2006 · Paper 2 · Question 7(c)

Plant 1 has roots immersed in dilute potassium cyanide solution in 20% humidity. Plant 2 has roots in distilled water in 100% humidity.

Discuss the effects these conditions would have on water uptake, mineral ion transport, and transpiration.

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  1. 7(a)Describe the ascent of water in plants from outside the root to the intercellular spaces of the leaf. Include the role of root pressure, capillarity, cohesion,…[10 marks]
  2. 7(b)Relate the structure of xylem vessels to their function.[4 marks]

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