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Transport in Plants

Short Answer Type

1. 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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2. Why the cortex produces no resistance to movement of water ?

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3. What is transmembrane pathway ?

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One Word Answers

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

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5. Who introduced the apoplast—symplast concept ?

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Short Answer Type

6. Why transpiration is more on lower surface than on upper surface of leaves ?

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One Word Answers

7. Give the term for the ability to rise in thin tubes.

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Short Answer Type

8. What is capillarity ?

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9. Name the two forces responsible for the rise of water in a capillary tube.

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10. Which force is first operative in translocation of water through capillarity : cohesive force or adhesive force ?

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