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Question-1
Movement of leaves of sensitive plant, Mimosa pudica is due to
(A)
thermonasty
(B)
seismonasty
(C)
hydrotropism
(D)
chemonasty
Question-2
Abscisic acid causes
(A)
stomatal closure
(B)
stem elongation
(C)
leaf expansion
(D)
root elongation
Question-3
Abscisic acid controls
(A)
cell division
(B)
leaf fall and dormancy
(C)
shoot elongation
(D)
cell elongation and wall formation
Question-4
"Foolish seedling" disease of rice led to the discovery of
(A)
GA
(B)
ABA
(C)
2, 4D
(D)
IAA
Question-5
Phytohormones are
(A)
chemicals regulating flowering
(B)
chemicals regulating secondary growth
(C)
hormones regulating growth from seed is adulthood
(D)
regulators synthesized by plants and influencing physiological processes
Question-6
Movement of auxin is
(A)
centripetal
(B)
basipetal
(C)
acropetal
(D)
both(b) and (c)
Question-7
Cell elongation in internodal regions of the green plants takes place due to
(A)
indole acetic acid
(B)
cytokinins
(C)
gibberellins
(D)
ethylene
Question-8
Opening of floral buds into flowers, is a type of
(A)
autonomic movement of locomotion
(B)
autonomic movement of variation
(C)
paratonomic movement of growth
(D)
autonomic movement of growth
Question-9
Ethylene gas is used for
(A)
growth of plants
(B)
delaying fruit's abscission
(C)
ripening of fruits
(D)
stopping the leaf abscission
Question-10
Gibberellins promote
(A)
seed germination
(B)
seed dormancy
(C)
leaf fall
(D)
root elongation
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Plus 2 Biology Science
ICSE/ISC
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