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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
Differentiate between apoplast pathway and symplast pathway.

Apoplast pathway

Symplast pathway

1. Apoplast is the system of adjacent walls and continuous through the plant except at casparian strips.

2. There is no role of plasmodesmata.

3. It occurs through cell wall and intercellular spaces. Cell membrane is not crossed.

4. It is fast.

5. It is not aided by streaming movement of cytoplasm.

6. It does not involve osmosis.

1. It is the system of interconnected protoplasts.

2. Continuity of protoplasm from one cell to another cell is through plasmodesmata.

3. It occurs through cell membrane.

4. It is slow.

5. It is aided by streaming movements of cytoplasm.

6. It involves osmosis.

 
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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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Who introduced the apoplast—symplast concept ?

E. Munch (1930).
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Give the term for the ability to resist a pulling force.

Tensile strength
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What is transmembrane pathway ?

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