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Free download in PDF Plant Water Relation Short Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
41
The rapid type of water absorption is
[A]
Passive absorption
[B]
Active non-osmotic absorption
[C]
Active absorption
[D]
Active osmotic absorption
Answer: Passive absorption
42
Root pressure is due to
[A]
Increased transpiration
[B]
Passive absorption
[C]
Increased turgidity
[D]
Active absorption
Answer: Active absorption
43
Root pressure is absent in
[A]
Gymnosperms
[B]
Trees
[C]
Herbaceous plants
[D]
Dicot plant
44
Maximum root pressure is observed when
[A]
Transpiration is high and absorption is low
[B]
Transpiration is low an dabsorption is high
[C]
Transpiration and absorption are very high
[D]
Transpiration and absorption are very low
Answer: Transpiration is low an dabsorption is high
45
The existence of root pressure can be demonstrated by
[A]
Bleeding
[B]
Wilting
[C]
Transpiration
[D]
Exudation or bleeding
Answer: Exudation or bleeding
46
Which of the following physical forces are supposed to be responsible for ascent as sap?
[A]
Transpiration pull and cohesion
[B]
Capillary force
[C]
Imbibition
[D]
Root pressure
Answer: Transpiration pull and cohesion
47
Upward movement of water in plants is
[A]
Sucking
[B]
Transpiration
[C]
Exudation
[D]
Ascent of sap
48
In a plant cell, O.P. is equal to
[A]
T.P. – D.P.
[B]
D.P.D. + T.P.
[C]
T.P. – D.P.D
[D]
D.P.D. – T.P.
49
Absorption of water from cut ends of stems disapproves the theory of
[A]
Root pressure theory
[B]
Imbibitional pressure theory
[C]
Capillarity
[D]
Cohesion-tension theory
Answer: Root pressure theory
50
Stomata opens because the guard cells have-
[A]
Inner thick walls
[B]
Kidney shape
[C]
Outer thin walls
[D]
Chloroplast
51
The special modified epidermal cells surrounding stomatal pore are called
[A]
Subsiduary cells
[B]
Accessory cells
[C]
Guard cells
[D]
Epithelial cells
52
The cells which are closely associated and intercating with guard cells are
[A]
Subsidiary cells
[B]
Hypodermal cells
[C]
Transfussion tissue
[D]
None of above
53
Transpiration through leaves in called as
[A]
Foliar transpiration
[B]
Lenticular transpiration
[C]
Cauline transpiration
[D]
Cuticular transpiration
Answer: Foliar transpiration
54
Maximum root pressure develops, when
[A]
Transpiration is low and absorption is high
[B]
Transpiration and absorption are high
[C]
When transpiration and absorption are low
[D]
Transpiration is low and absorption is low
Answer: Transpiration is low and absorption is high
55
DPD of flacid cell and turgid cell is ______and _____ respectively.
[A]
Zero and Maximum
[B]
Minimum and Maximum
[C]
Zero and zero
[D]
Maximum and Minimum
Answer: Maximum and Minimum
56
The magnitude of root pressure will be minimum in
[A]
During ascent of sap
[B]
Fast transpiring angiosperms
[C]
Wilting plant
[D]
Rainy season
57
Cohesion of water molecules is due to___________
[A]
Surface tension
[B]
Gravitational force
[C]
Diffusion
[D]
Osmosis
58
Which of the following is NOT the property of water?
[A]
Nonpolar molecule
[B]
High specific heat
[C]
High heat of vaporization
[D]
Excellent solvent
Answer: Nonpolar molecule
59
Name the term which is given for the movement of water through a semipermeable membrane?
[A]
Osmosis
[B]
Tonicity
[C]
Diffusion
[D]
Transpiration
40
A cell increase in volume when it is placed in
[A]
Hypotonic solution
[B]
Isotonic solution
[C]
Hypertonic solution
[D]
None of these
Answer: Hypotonic solution
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