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31. Why walls of xylem vessels have great affinity for the attraction of water ?

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32. Which type of guard cells are found in grasses ?

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33. List the functions of turgor pressure.

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34. Name the plant process carried by hydathodes.

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35. What is permanent wilting ?

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36. Give the significance of plasmolysis.

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37. The condition when the external solution balances the osmotic pressure of the cytoplasm is called as ?

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38. What is the external solution called when it is dilute than the cytoplasm.

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39. What is the external solution called when it is more concentrated than the cytoplasm?

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40. Discuss root pressure responsible for ascent of sap

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