1.
Thigmotropic movement is best shown by
A
movement in tendril
B
insectivorous plants
C
movement in roots
D
movement in Mimosa pudica
Answer :
movement in tendril
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2.
Which one of the following nutrients in concerned with the growth of the plants in view of their role in synthesis of auxin
A
S
B
N
C
Zn
D
K
Answer :
Zn
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3.
Which of the following is a coconut milk factor
A
Auxin
B
ABA
C
Morphactin
D
Cytokinin
Answer :
Cytokinin
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4.
Which of the following effets of auxins is of wide application
A
Induction of fruit development
B
Induction of root initiation
C
Prevention of abscission
D
All of the above
Answer :
All of the above
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5.
Which pigment absorbs the red and far-red light
A
Cytochrome
B
Phytochrome
C
Carotenoids
D
Chlorophyll
Answer :
Phytochrome
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6.
Movement of male gametes in lower plants (Fern, Bryophytes) is
A
Thermotactic
B
Chemotropism
C
Chemotactic
D
Phototactic
Answer :
Chemotactic
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7.
The most common cytokinin is
A
IAA
B
Kinetin
C
Isopentanly adenine
D
Dehydrozeatin
Answer :
Isopentanly adenine
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8.
Which of the following plant hormone subsitutes for long photoperiod is flowering plant
A
Auxin
B
Gibberellin
C
Cytokinin
D
Enthylene
Answer :
Gibberellin
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9.
I.A.A. mainly inhibits growth of
A
Root
B
Leaf
C
Shoot
D
Generally whole plant
Answer :
Root
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10.
Auxin can be bioassayed by :
A
Hydroponics
B
Potometer
C
Lettuce hypocotyl elongation
D
Avena coleoptile curvature
Answer :
Avena coleoptile curvature
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