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Transport in Plants

Short Answer Type

71. What is the mode of absorption by epiphytic roots ?

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72. Which two things are reponsible for the movement of water up a plant

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73. The highest osmotic pressure is recorded in.

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74. In what way does the concept of water potential help in explaining water movement ?

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75. Loss of water decreases or increases Ψ_w? Comment.

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Long Answer Type

76. Is there a general mechanism to explain opening and closing of stomata? Justify your answer.

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Short Answer Type

77. One way in which osmotic pressure is different from the osmotic potential.

Osmotic pressure is equivalent to the osmotic potential but osmotic pressure is the positive pressure apllied whereas the osmotic potential is negative.

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One Word Answers

78. Which force helps in the absorption of water ?

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Short Answer Type

79.

What cause the opening and closing of guard cells of stomata during transpiration ?

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One Word Answers

80. Name the state of the cell when the water flow in and out of the cell is in equilibrium.

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