The opening of stoma is also…….due to the orientation of the microfibril in the …….

of guard cells.

(1) Supported, cytoplasm

(2) Supported, cell wall

(3) Affected, cell membrane

(4) Affected, cytoplasm

Subtopic:  Stomata |
 52%
From NCERT
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Microfibril of Guard cells of stoma are not

(1) Made up of Cellulose

(2) Oriented radially

(3) Makes it more easy for stoma to open

(4) Found in cytoplasm

Subtopic:  Stomata |
 78%
From NCERT
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When stomata is open

(1) Outer wall of guard cell is crescent shaped

(2) Outer wall is bulged out while inner wall is crescent shaped

(3) Outer wall is crescent shaped while inner wall is flat

(4) Outer wall is flat while inner wall is crescent shaped

Subtopic:  Stomata |
 82%
From NCERT
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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 |
 77%
From NCERT
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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 |
 79%
From NCERT
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Transpiration is affected by internal factors

Find the wrong one

(1) Number of stomata

(2) Water status of plant

(3) Percent of open stomata

(4) Wind speed

Subtopic:  Transpiration & Guttation |
 83%
From NCERT
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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 |
 73%
From NCERT
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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 |
 90%
From NCERT
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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 |
 87%
From NCERT
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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 |
 67%
From NCERT
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