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Question-1
In a plant organ, which is covered by periderm and in which the stomata are absent, some gaseous exchange still takes place through
(A)
Lenticels
(B)
Trichomes
(C)
Aerenchyma
(D)
Pneumatophores
Question-2
DPD is equal to
(A)
OP
(B)
TP
(C)
OP+TP
(D)
OP-TP
Question-3
Guttation is the direct evidence for the presence of
(A)
Tension
(B)
Root pressure
(C)
Turgor pressure
(D)
Water potential
Question-4
The exchange of substances, between individual cells and their environment, takes place by
(A)
Osmosis
(B)
Diffusion
(C)
Active transport
(D)
All of these
Question-5
Primitive types of stomata are found in
(A)
Apophysis of capsule
(B)
Leaves of moss plants
(C)
Axes of moss plants
(D)
Submerged hydrophytes
Question-6
Opening and closing of stomata is due to the change in
(A)
Gaseous state
(B)
No. of guard cell
(C)
respiratory system
(D)
osmotic concentration of guard cells
Question-7
The thin film of water, covering the soil particles and held strongly by attractive forces, is called
(A)
Run-away
(B)
Capillary
(C)
Gravitational
(D)
Hygroscopic
Question-8
Water lost in guttation is
(A)
Pure water
(B)
Impure water
(C)
In vapour form
(D)
solid form
Question-9
Wilting occurs when
(A)
Relative humidity is high
(B)
Rate of transpiration is equal to the rate of absorption
(C)
Rate of transpiration is higher than that of the rate of absorption
(D)
Rate of absorption is higher than the rate of transpiration
Question-10
With an increase in the turgidity of a cell, the wall pressure will
(A)
Increase
(B)
Decrease
(C)
Fluctuate
(D)
Remain unchanged
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Plus 2 Biology Science
ICSE/ISC
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