11.
Pjhytochrome was discovered by
A
W.Want
B
Garner and Allard
C
F.F Blackman
D
Borhwic k and Handricks
Answer :
Borhwic k and Handricks
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12.
When a plamolysed cell is placed in a hyotonic solution then water will move inside the cell. Which force causes this
A
DPD
B
OP
C
WP
D
None of the above
Answer :
DPD
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13.
The solute potential can be determined in a simple manner by
A
Water potential
B
DPD
C
Osmotic pressure
D
Suction pressure
Answer :
Osmotic pressure
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14.
Bidirectional translocation of minerals takes place in
A
xylem
B
phloem
C
parenchyma
D
cambium
Answer :
phloem
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15.
The relationship between DPS& can be expressed as
A
DPD = Ψw
B
Ψw -DPD = 0
C
DPD/Ψw = 0
D
Ψw = - DPD
Answer :
Ψw = - DPD
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16.
Leaves of Nelumlbo plant are
A
Epistomatic
B
Hypostomatic
C
Amphistomatic
D
None of the above
Answer :
Epistomatic
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17.
Maximum osmotic pressure is found I
A
Root hair
B
Cortex cell of the root
C
Passage cell of the root
D
Mesophyll cell
Answer :
Mesophyll cell
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18.
The most widely accepted theory for ascent of sap in trees is
A
capillarity
B
role of atmospheric pressure
C
pulsating action of living cell
D
transpiration pull and cohesion theory of Dixon and Jolly
Answer :
transpiration pull and cohesion theory of Dixon and Jolly
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19.
Plants absorb mineral salts from the soil solution through
A
A semipermeable membrane into the cytoplasm
B
Perforations at the apex of root hair cells
C
The cell wall which is semipermeable
D
None of the above
Answer :
A semipermeable membrane into the cytoplasm
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20.
The hydathodes are related with
A
Transpiration
B
Guttation
C
Bleeding
D
All of the above
Answer :
Guttation
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