Ownclasses

A column of water within xylem vessels of tall trees does not break under its weight because of

  • Dissolved sugars in water

  • Tensile strength of water

  • Lignification of xylem vessels

  • Positive root pressure

Answer

B.

Tensile strength of water

A column of water within xylem vessels of tall tree does break under its weight because of high tensile strenght of water, i.e. an ability to resist a pulling force. This high tensile property depends on cohesion, adhesion and surface tension property of water. Due to these forces only transpiration drive ascent of xylem sap occurs.

A column of water within xylem vessels of tall tree does break under its weight because of high tensile strenght of water, i.e. an ability to resist a pulling force. This high tensile property depends on cohesion, adhesion and surface tension property of water. Due to these forces only transpiration drive ascent of xylem sap occurs.