331.
An adaptation for better gaseous exchange in plant leaves is
A
hair on lower surface
B
multiple epidermis
C
waxy cuticle
D
stomata on lower surface away from direct sun rays
Answer :
stomata on lower surface away from direct sun rays
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332.
The movement of pollen tube is called
A
Chemotropism
B
Thermotaxis
C
Thermonastic
D
Hydrotropism
Answer :
Chemotropism
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333.
Loss of water from tips of leaves is called
A
Bleeding
B
Guttation
C
Respiration
D
Transpiration
Answer :
Guttation
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334.
Which Ca&K elements are considered as balancing elements
A
Ca&K
B
C&H
C
N&S
D
Mgand Fe
Answer :
Ca&K
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335.
Which of the following does NPK denote
A
Nitrogen, Potassium, Kinetin
B
Nitrogen, Protein, Kinetin
C
Nitrogen, Protein, Potassium
D
Nitrogen, Phosphorus, Potassium
Answer :
Nitrogen, Phosphorus, Potassium
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336.
If the solute is added in the given solution than what observation can be made
A
Its DPD decrease
B
It's water potential decreases
C
DPD & water potential remains unchanged
D
Its water potential increases
Answer :
It's water potential decreases
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337.
Who propounded the concept of osmosis
A
Abbe Nollet
B
Mayer
C
Dixon and jolly
D
Renner
Answer :
Abbe Nollet
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338.
The osmotic pressure is due to
A
Solute
B
Semi permeable membrane
C
Hypertonic solution
D
Water DPD (SP)
Answer :
Solute
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339.
Root pressure theory was proposed by
A
Priestley
B
Stephen Hales
C
Levitt
D
Sachs
Answer :
Priestley
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340.
In a fully turgid cell the values of DPD, OP and TP should be
A
DPD=10 atm, OP=15 atm, TP-5atm.
B
DPD=5atm,OP=10a tm, TP=7atm.
C
DPD-5atm,OP=7atm , TP=5atm.
D
DPD=2atm,OP=15atm,TP-15-15atm
Answer :
DPD=2atm,OP=15atm,TP-15-15atm
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