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Explain why xylem transport is unidrecti...

Explain why xylem transport is unidrectional and phloem transport bi-directional.

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MODERN PUBLICATION-TRANSPORT IN PLANTS-EXERCISE
  1. Discuss the factors responsible for ascent of xylem sap in plants.

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  2. What essential role does the root endodermis play during mineral absor...

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  3. Explain why xylem transport is unidrectional and phloem transport bi-d...

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  4. Explain pressure flow hypothesis of translocation of sugars in plants.

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  5. What causes the opening and closing of guard cells of stomata during t...

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  6. Which of the following is used to measure the rate off transpiration?

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  7. Plant will undergo silting under one of these conditions?

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  8. If CO2 concentration suddenly increass around the leaf ,one of the ffo...

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  9. Presence of glycolate in the cells will help to open stomata when ther...

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  10. When water enters the plant cell one of the pressure is exerted on the...

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  11. The cohesive force existing between molecules off waer is contributin...

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  12. Opening and closing of stomata is due to the:

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  13. Root hairs are found:

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  14. Osmotic pressure of a solution is

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  15. If the concentration of external solution is more than the cytoplasm, ...

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  16. Water is released as droplet this is known as:

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  17. Stomata of a plant open due ot:

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  18. Plasmodesmata connections help in:

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  19. Dumbshell shaped guard cells are found in:

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  20. Wilting in plant occurs due to:

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