381.
When the solute has been added in the solution, then following observation can be made
A
The DPD of the solution decreases
B
The of the solution increases
C
DPD of the solution decreases while its increases
D
DPD of the solution increases while its decreases
Answer :
DPD of the solution increases while its decreases
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382.
One molar solution of which substance will have maximum O.P
A
NaCl
B
Glucose
C
Fructose
D
Starch
Answer :
NaCl
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383.
Stomata open and close due to
A
circadian rhythm
B
genetic clock
C
pressure of gases inside the leaves
D
turgor pressure of guard cells
Answer :
turgor pressure of guard cells
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384.
Active uptake of minerals depends upon
A
Active ions absorption
B
Transpiration
C
Photorespiation
D
Dephosphorylation
Answer :
Dephosphorylation
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385.
With decrease in atmospheric pressure the rate of transpiration will
A
Remain unaffected
B
Increased
C
Decrease slowly
D
Decrease rapidly
Answer :
Increased
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386.
Process of selective transmission of a liquid through semi permeable membrane is called
A
Diffusion
B
Osmosis
C
Plasmolysis
D
Transmission
Answer :
Osmosis
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387.
The most accepted theory for ascent of sap is
A
Relay pump theory
B
Pulsation theory
C
Root pressure theory
D
Transpiration pull cohesion theory
Answer :
Transpiration pull cohesion theory
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388.
At constant temperature, the rate of transpiration will be higher at
A
Sea level
B
$$1\,km$$ below sea level
C
$$1\,km$$ above sea level
D
$$1.5\,km$$ above sea level
Answer :
$$1.5\,km$$ above sea level
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389.
Stomata in grass leaf are
A
Dumb-bell shaped
B
Kidney shaped
C
Barrel shaped
D
Rectangular
Answer :
Dumb-bell shaped
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390.
Which method is responsible for most of the absorption in higher plants
A
Active absorption
B
Passive absorption
C
Osmotic absorption
D
Non osmotic absorption
Answer :
Passive absorption
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