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Transport in Plants

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Biology

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Biology

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CBSE Gujarat Board Haryana Board

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Class 10 Class 12
Difference between the following
(c) Osmotic Pressure and Osmotic Potential

Osmotic Pressure  Osmotic Potential
1.Osmotic pressure is the minimum pressure which needs to be applied to a solution to prevent the inward flow of water across a semipermeable membrane.   1.Osmotic potential is defined as the ability of a solution to draw water in when separated from another solution by a semi-permeable
2. It is expressed in bars with a positive sign. 2. It is expressed in bars with a negative sign.









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Give the term for the ability to resist a pulling force.

Tensile strength
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Who introduced the apoplast—symplast concept ?

E. Munch (1930).
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Why the water is forced to move through cell membrane beyond endodermis ?

Water is forced to move through cell membranes beyond endodermis because of the suberin (waxy substance) present on radial walls of endodermal cells blocks water and solute movement through cell walls of endodermis. 
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Why the cortex produces no resistance to movement of water ?

The cortical cells are loosely packed and produce no resistance to movement of water via cell walls or apoplast.
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What is transmembrane pathway ?

The movement of water through cell membranes is called trans membrane pathway.
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