121.
Movement due to external stimuli is known of
A
Autonomic movement
B
Paratonic movement
C
Ameboid movement
D
Excretory movement
Answer :
Paratonic movement
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122.
Bananas can be prevented from over-ripening by
A
maintaining them at room temperature
B
refrigeration
C
dipping in ascorbic acid solution
D
storing in a freezer
Answer :
dipping in ascorbic acid solution
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123.
IAA ws isolated by
A
Kogl and Erxleben
B
Kogl and Haagen Smit
C
Exleben and Haagen Smit
D
Kogl, Darwin and Haagen Smit
Answer :
Kogl and Haagen Smit
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124.
Hydrotropism have seen in
A
Flowers
B
Seedlings
C
Stem
D
None of the above
Answer :
Seedlings
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125.
Stem elongation is affected by
A
Gibberelling and florigen
B
Auxin and gibberellin
C
Florigen and kinin
D
Kinin and auxin
Answer :
Auxin and gibberellin
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126.
Which of the following exerts profound effect on the reproductive growth of a flowering plant
A
Quality of light
B
Quantity of light
C
Direction of light
D
Duration of light cycles
Answer :
Duration of light cycles
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127.
Greater growth on the lower surface of a bifacial leaf is
A
Nyctinasty
B
Photonasty
C
Hyponasty
D
Epinasty
Answer :
Hyponasty
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128.
Recognition of ethylene as a natural plant hormone was done by
A
Pratt Goeschl
B
Richmond Lang
C
Sorokin
D
Haberlandt
Answer :
Pratt Goeschl
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129.
Auxin inhibits the growth of
A
Apical bud
B
Lateral axillary buds
C
Roots on stem cutting
D
Parthenocarpic development of fruits
Answer :
Lateral axillary buds
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130.
Which growth hormone is responsible for apical dominance
A
Auxin
B
Cytokinin
C
Gibberellin
D
Ethylene
Answer :
Auxin
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