Transpiration and root pressure cause water t | vedclass

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(D) : The transpiration process pulls water upwards with the help of cohesion and adhesion properties of water molecules. According to the transpirati

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pulling and pushing it,respectively.

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(D) : The transpiration process pulls water upwards with the help of cohesion and adhesion properties of water molecules. According to the transpiration pull theory,due to transpiration,the water column inside the plant comes under tension. This is called 'transpiration pull'. On account of this tension,the water column is pulled up passively from below to the top of the plant (almost like a rope).Root pressure is the pressure that forces water,absorbed from the soil,to move through the roots and up ($i.e.$,pushes it up) the stem of a plant. It may be due to both the osmosis of water from the soil into the root cells,and the active pumping of salts into xylem tissue which maintains a concentration gradient along which the water moves.

Column-$I$	Column-$II$
$I.$ Polarity	$p.$ Aquatic organisms can float
$II.$ Viscosity	$q.$ Lakes do not freeze in winter
$III.$ Latent heat	$r.$ Ascent of sap against gravity
$IV.$ Cohesive force	$s.$ Water is an efficient solvent

Transpiration and root pressure cause water to rise in plants by

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