401.
If a cell is placed in a hypertonic solution then ?w of the cell will be
A
Increased
B
Decreased
C
Unchanged
D
First increased then decreased
Answer :
Decreased
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402.
Which of the following is used to determine the rate of transpiration in plants?
A
Porometer/hygrometer
B
Potometers
C
Auxanometer
D
Tensiometer / Barometer
Answer :
Potometers
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403.
Guttation is dependent on
A
Root pressure
B
Active absorption
C
Flaccidity of root critical cells
D
High rate of transpiration
Answer :
Root pressure
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404.
Photoropism is due to the hormone
A
1AA
B
GA
C
2-4D
D
Cytokinin
Answer :
1AA
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405.
Guard cells help in:
A
transpiration
B
guttation
C
fighting against infection
D
protection against grazing
Answer :
transpiration
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406.
Auxanometer is used to measure
A
Length
B
Width
C
Depth
D
Growth
Answer :
Growth
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407.
The most common auxin is
A
GA
B
ABA
C
Kinetin
D
IAA
Answer :
IAA
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408.
The presence of auxins in a solution could e tested
A
Avena sativa stem tip test
B
Carbon tetrahloride test
C
Iodine test
D
Defoliation test
Answer :
Avena sativa stem tip test
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409.
Which chemical is used to detect transpiration comparatively
A
Calcium carbonate
B
Cobalt carbonate
C
Coobalt chloride
D
Mercuric acetate
Answer :
Coobalt chloride
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410.
Which of the following plant do not transpire
A
Algae
B
Fungi
C
Submerged hydrophyes
D
All of the above
Answer :
All of the above
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