If alcohol treated cell is kept in hypertonic solution it:

1. Bursts

2. Plasmolysed

3. Remains same

4. None

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The loss of water through cuticle may reach upto :

1. 5%

2. 10%

3. 20%

4. 40%

Subtopic:  Transpiration & Guttation |
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Dry wooden stakes, if driven into a small crack in a rock and then soaked, can develop enough pressure to split the rock. Such a pressure is built up through the phenomenon of :

1. Imbibition

2. Buttress roots

3. Prop roots

4. Turgor pressure

Subtopic:  Imbibition |
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The cohesive force existing between molecules of water is contributing to :

1. ascent of sap

2. translocation

3. plasmolysis

4. osmosis.

Subtopic:  Ascent of Sap |
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To initiate cell plasmolysis, the salt concentration must be :

1. isotonic

2. hypertonic

3. hypotonic

4. atonic

Subtopic:  Plant Water Relations: Plasmolysis |
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Ascent of sap is mainly attributed to :

1. cohesion force

2. imbibition

3. root pressure

4. capillarity

Subtopic:  Ascent of Sap |
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Solution concentration is higher in the external solution. The solution is

1. Isotonic

2. Hypotonic

3. Hypertonic

4. None of the above.

Subtopic:  Plant Water Relations: Plasmolysis |
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Which of the following statements are true/false?

a. the positive hydrostatic pressure is called turgor pressure.

b. wall pressure exerts to prevent the increase of protoplasm size.

c. diffusion is more rapid in liquids than in gases

d. diffusion of water through a semi-permeable membrane is called imbibition

e. osmosis is movement of substances which takes place along a diffusion gradient.

1. a and b are true & c, d and e are false

2.  a and c are true & d, d and e are false

3.  a and d are true & b, c and e are false

4.  a and e are true & b, c and d are false

 

Subtopic:  Plant Water Relations: Water Potential: 2 | Plant Water Relations: Water Potential: DPD | Plant Water Relations: Reverse Osmosis & Water Potential |
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Path of water movement from soil to xylem is :

1. soil root hair cortex pericycle endodermis metaxylem protoxylem

2. soil root hair cortex endodermis pericycle protoxylem metaxylem

3. soil root hair epidermis endodermis phloem xylem

4. soil root hair epidodermiscortex phloem xylem

Subtopic:  Pathways of Transport: Illustration |
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Turgor pressure is also referred to as

1. solute potential

2. water potential

3. pressure potential

4. osmotic potential

Subtopic:  Plant Water Relations: Water Potential: 2 | Plant Water Relations: Water Potential: DPD | Plant Water Relations: Reverse Osmosis & Water Potential |
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