BY1.1 - Water

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  • Water is a polar molecule
  • It has no overall charge
  • As a result, molecules are attracted to one another 


  • Due to the attraction, hydrogen bonds are formed between water molecules
  • This allows columns of water to be drawn up the xylem vessels

Surface Tension:

  • Water has a high surface tension
  • This allows the bodies of insects (e.g. pondskaters) to be supported on the water surface


  • Chemical reactions occur in solution
  • Non polar molecules (e.g. lipids) don't dissolve 

Transport Medium:

  • In plants:


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