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Question-1
Anthesis is a phenomenon which refers to
(A)
reception of pollen by stigma
(B)
formation of pollen
(C)
development of anther
(D)
opening of flower bud
Question-2
A plant hormone used for inducing morphogenesis in plant tissue culture is
(A)
gibberellins
(B)
cytokinins
(C)
ethylene
(D)
abscisic acid
Question-3
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-4
A chemical believed to be involved in flowering is
(A)
gibberellin
(B)
kinetin
(C)
florigen
(D)
IBA
Question-5
Proteinaceous pigment which control activities concerned with light
(A)
phytochrome
(B)
chlorophyll
(C)
anthocyanin
(D)
carotenoids
Question-6
Differentiation of shoot is controlled by
(A)
high gibberellin-cytokinin ratio
(B)
high auxin-cytokinin ratio
(C)
high cytokinin-auxin ratio
(D)
high gibberellin-auxin ratio
Question-7
"Foolish seedling" disease of rice led to the discovery of
(A)
GA
(B)
ABA
(C)
2, 4D
(D)
IAA
Question-8
Which of the following hormones can replace vernalization?
(A)
Auxin
(B)
Cytokinin
(C)
Gibberellins
(D)
Ethylene
Question-9
One set of a plant was grown at 12 hr day and 12 hr night period cycles and it flowered while in the other set night phase was interrupted by flash of light and it did not produce flower.Under which one of the following categories will you place this plant?
(A)
Long-day
(B)
Darkness neutral
(C)
Day neutral
(D)
Short-day
Question-10
The pigment , that absorbs red and far-red light in plants, is
(A)
xanthophyll
(B)
cytochrome
(C)
phytochrome
(D)
carotene
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Plus 2 Biology Science
ICSE/ISC
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