Xylem transports from roots to the aerial parts of the plants

(1) Water, mineral salts

(2) Some organic Nitrogen

(3) Inorganic solutes, Hormones

(4) All of these

Subtopic:  Ascent of Sap |
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The source and sink may be reversed

(1) Depending on the season

(2) Depending on the plant's needs

(3) Depending on the phloem type

(4) Both A and B

Subtopic:  Ascent of Sap |
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Which of the following helps in ascent of sap?

(1) Root pressure

(2) Transpiration

(3) Capillarity

(4) All of these

Subtopic:  Ascent of Sap |
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Mass flow or bulk flow system is the movement of substances in bulk or en masse from one point to another point as a result of

(1) Pressure Difference between two points

(2) Osmotic gradient between two points

(3) Concentration gradient between two points

(4) Cannot be predicted

Subtopic:  Ascent of Sap |
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The process responsible for the movement of water from roots to all other parts of plants is

1. Evaporation of Water from leaves 

2. Capillary action 

3. Active transport 

4. Both 1 and 2

Subtopic:  Ascent of Sap |
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The continuous excretion of watery substance
from stump of a well-watered potted plant after
cutting off the shoot slightly above the base is
due to
1. root pressure

2. guttation

3. transpiration

4. imbibitions

Subtopic:  Ascent of Sap |
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In xylem continuous chain of water is re-established, when it is broken, by
1. Guttation
2. Root pressure
3. Imbibition
4. Transpiration

Subtopic:  Ascent of Sap |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology