361.
The direction of the movement of water
A
From low OP to OP
B
From low DPD to high DPD
C
From high DP to low DP
D
All of the above
Answer :
All of the above
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362.
Absorption of water is increased when
A
Transpiration is increased
B
Photosynthesis is increased
C
Respiration is increased
D
Rood pressure is increased
Answer :
Transpiration is increased
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363.
Which of the following plant hormone is extracted from fungus
A
Ethylene
B
Gibberellin
C
Cytokinin
D
2,4,D
Answer :
Gibberellin
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364.
The trunk of a tree shrinks in day due to
A
Rapid translocation of food
B
Transpiration induced tension
C
Rapid growth in day hours
D
Light induced elongation of plant
Answer :
Transpiration induced tension
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365.
Removal of ring wood of tissue outside the vascular cambium form the tree trunk kills it because
A
Water cannot move up
B
Food does not travel down and root because starved
C
Shoot become starved
D
Annual ring are not produced
Answer :
Food does not travel down and root because starved
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366.
In a fully turgid plant cell which one is zero
A
Turgor pressure
B
Wall pressure
C
DPD
D
None of the above
Answer :
DPD
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367.
"Reclamation " and "Little leaf" disease, caused by deficiency of
A
Zn and Mo
B
Cu and Zu
C
Cu and B
D
Mu and Cu
Answer :
Cu and Zu
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368.
Which type of plant are physiologically dry
A
Hjydrophtes
B
Epiphytes
C
Lithophtes
D
Halohytes
Answer :
Halohytes
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369.
Grass leaves curl inwards during very dry weather. Select the most appropriate reason from the following:
A
Closure of stomata
B
Flaccidity of bulliform cells
C
Shrinkage of air spaces in spongy mesophyll
D
Tyloses in vessels
Answer :
Flaccidity of bulliform cells
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370.
Water potential in the leaf tissue is positive (+) during
A
excessive transpiration
B
low transpiration
C
excessive absorption
D
guttation
Answer :
guttation
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