181.
Suitable temperature for active absorption of water by root is
A
40-45°C
B
10-15°C
C
20-35°C
D
Can take at any temperature
Answer :
20-35°C
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182.
The hydrostatic pressure developed in the cell is called
A
Turgor pressure
B
Wall pressure
C
Osmotic pressure
D
Suction pressure
Answer :
Turgor pressure
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183.
If there is high amount of fertilizer present in soil & it is deficient in water then what will be the effect
A
Over growth
B
Under growth
C
No effect
D
Wilting of plants
Answer :
Wilting of plants
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184.
Water potential is affected by
A
Osmotic potential
B
Matric potential
C
Pressure potential
D
All of the above
Answer :
All of the above
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185.
Who proposed the 'Cohesion Theory of ascent of sap
A
Straburger
B
Godlewski
C
Western
D
Dixon and Jolly
Answer :
Dixon and Jolly
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186.
Which mineral nutrients are called critical element for crops
A
N,P,K
B
C,H,O
C
N,S,Mg
D
K. Ca, Fe
Answer :
N,P,K
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187.
Which plant hormone causes fruit repening
A
IAA
B
Cytokinin
C
Ethylene
D
GA
Answer :
Ethylene
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188.
What is the direction of the movement of water it two cells have the same OP but differ in TP
A
No net flow
B
From lower T.P to higher TP
C
From higher T.P. to lower TP
D
Data insufficient
Answer :
From higher T.P. to lower TP
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189.
Solute potential can be presented as
A
Ψs = -OP
B
Ψs = OP
C
OP - Ψs = 0
D
Ψs/OP = 0
Answer :
Ψs = -OP
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190.
Which of the following water comes under echards
A
Available to the plant
B
Whole of the soil water
C
Amount of water not available to the plant
D
None of the above
Answer :
Amount of water not available to the plant
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