When guard cells lose turgor due to…….the elastic …….regain its shape and guard cells become…..

(1) Water stress, outer wall and Turgid

(2) Toxic, Inner wall and Flaccid

(3) Toxic, Outer wall and Turgid

(4) Water stress, Inner wall and Flaccid

Subtopic:  Stomata |
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Transpiration is affected by external factors

Find the wrong one.

(1) Temperature, Light

(2) Humidity

(3) Wind Speed

(4) Canopy structure

Subtopic:  Transpiration & Guttation |
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Transpiration is affected by internal factors

Find the wrong one

(1) Number of stomata

(2) Water status of plant

(3) Per cent of open stomata

(4) Wind speed

Subtopic:  Transpiration & Guttation |
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Number and distribution of stomata, Per cent of open stomata, water status of the plant, Canopy Structure, Temperature, light, Humidity, wind speed

How many factors are externally and internally affecting transpiration?

(1) 5,3

(2) 4,4

(3) 3,5

(4) 2,6

Subtopic:  Transpiration & Guttation |
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Transpiration driven ascent of xylem depends on which of the following properties of water?

(1) Cohesion

(2) Adhesion

(3) Surface tension

(4) All of these

Subtopic:  Transpiration & Guttation |
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Cohesion, adhesion and surface tension of water provides it

(1) High tensile strength

(2) High capillarity

(3) High transpiration pull

(4) Both A and B

Subtopic:  Transpiration & Guttation |
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Tensile strength is

(1) Mutual attraction between water molecules

(2) Attraction of water molecules to polar surfaces

(3) More attraction in water molecules in liquid phase than in gaseous phase

(4) An ability to resist a pulling force.

Subtopic:  Transpiration & Guttation |
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Cohesion is

(1) Mutual attraction between water molecules

(2) Attraction of water molecules to polar surfaces

(3) More attraction in water molecules in liquid phase than in gaseous phase

(4) An ability to resist a pulling force.

Subtopic:  Transpiration & Guttation |
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Capillarity is not aided by

(1) Cohesion

(2) Adhesion

(3) Tensile strength

(4) Small diameters of the tracheary elements- the tracheids and vessels

Subtopic:  Transpiration Pull: Illustration |
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The forces which are generated in xylem by transpiration pull can cause lifting of water up to

(1) 110 metres

(2) 13 metres

(3) 130 metres

(4) 19 metres

Subtopic:  Transpiration Pull: Illustration |
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