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Question-1
Sunken stomata is the characteristic feature of
(A)
Hydrophyte
(B)
Mesophyte
(C)
Xerophyte
(D)
Halophyte
Question-2
When a piece of potato is kept in a highly concentrated salt solution, then
(A)
Potato is plasmolysed
(B)
Potato is deplasmolysed
(C)
Potato cells get bursted
(D)
There is no effect due to isotonic solution.
Question-3
Water absorbs by roots reach to the top of a tall tree by means of
(A)
Root pressure
(B)
Capillary force
(C)
Pulsation and imbibition
(D)
Transpiration pull and cohesion of water molecules
Question-4
Which of the following is an anucleated living plant cell?
(A)
Vessel
(B)
Tracheid
(C)
Sieve tube
(D)
All of these
Question-5
DPD is equal to
(A)
OP
(B)
TP
(C)
OP+TP
(D)
OP-TP
Question-6
Which of the following plant is ideal to demonstrate ascent of sap?
(A)
Rose plant
(B)
Balsam plant
(C)
Coconut plant
(D)
Cucumber plant
Question-7
In old trees or woody plants, transpiration occurs by means of
(A)
Bark
(B)
Cork
(C)
Stomata
(D)
Lenticels
Question-8
Potometer works on the principle of
(A)
Root pressure
(B)
Osmotic pressure
(C)
Amount of water absorbed equals the amount transpired
(D)
Potential difference between tip of the tube and that of the plant
Question-9
Stomata of CAM plants
(A)
Never open
(B)
Are always open
(C)
Open at night and close during day
(D)
Open during day and close at night.
Question-10
Companion cells in plants are associated with
(A)
Vessels
(B)
Sperms
(C)
Guard cells
(D)
Sieve elements
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Plus 2 Biology Science
ICSE/ISC
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