451.
Which hormone is responsible for apical growth A
NAA
B
ABA
C
GA
D
All of the above
Answer :
NAA
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452.
Chlorosis is caused to deiviency of A
Mg
B
Ca
C
B
D
Mn
Answer :
Mg
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453.
Which of the following is used for ripening of fruits A
Auxin
B
ABA
C
Ethylene gas
D
Cytokinin
Answer :
Ethylene gas
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454.
Plant cell plasmolysed in solution which is A
Hypotonic
B
Hypertonic
C
Isotonic
D
Concentration no means
Answer :
Hypertonic
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455.
Passage of ascent of sap is shown by A
Osmometer
B
Porometer
C
Monometer
D
Blockage experiment
Answer :
Blockage experiment
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456.
Process of vernalization can be induced by A
Cytokinin
B
Auxin
C
Phototropin
D
GA
Answer :
GA
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457.
Osmosis is the diffusion of a solution of a weaker concentration when both are separated by semi-permeable membrane. What is error in the statement A
The movement of solvent molecule is not specified
B
There is no mention of DPD
C
Behavior of semi permeable membrane is not specified
D
The exact concentration of solutions are not indicated
Answer :
The movement of solvent molecule is not specified
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458.
Conversion of starch to organic acids is required for A
stomatal opening
B
stomatal closing
C
stomatal formation
D
stomatal activity
Answer :
stomatal opening
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459.
The pH in the guard cells was observed when stomata were open it ranges A
9-10
B
4-5
C
7.5
D
2-4
Answer :
7.5
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460.
Plant hormones are A
Growth regulators
B
Growth promoters
C
Growth inhibitors
D
None of the above
Answer :
Growth regulators
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