91.
Turgor movment is due to
A
Reversible changes in cell volume by efflux and influx of K+
B
Synthesis of new cell-wall
C
Irreversible change in cell volume
D
None of the above
Answer :
Reversible changes in cell volume by efflux and influx of K+
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92.
Which one is a long-day plant?
A
Tobacco
B
Glycine max
C
Mirabilis jalapa
D
Spinach
Answer :
Spinach
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93.
Apical dominace in higher plants is due to
A
Phyto hormones
B
Enxymes
C
Carbohydrates
D
Photoperiodism
Answer :
Phyto hormones
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94.
A hipothetical chemical belived to be involved in flowering is
A
Gibberellin
B
NAA
C
Florigen
D
IAA
Answer :
Florigen
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95.
Which one of the following pairs, is not correctly matched?
A
Gibberellic acid - Leaf fall
B
Cytokinin - Cell wall elongation
C
IAA - Cell wall elongation
D
Abscissic acid - Stomatal closure
Answer :
Gibberellic acid - Leaf fall
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96.
The firsdt cytikinin was discovered by
A
Skoog
B
Went
C
Addicot
D
Miller
Answer :
Miller
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97.
Maximum of growth occurs in
A
Exponential phase
B
Decline phase
C
Stationary phase
D
Lag phase
Answer :
Exponential phase
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98.
Which of the following auxins are widely used as herbicides
A
2, 4-D and 2, 4, 4-T
B
2, 4-D and cytokinin
C
2, 4-D and 2, 4-T
D
2, 4, 5-T and GA
Answer :
2, 4-D and 2, 4, 4-T
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99.
Internodal elenogation is stimulated by
A
Auxin
B
Cytokinijn
C
Gibberellin
D
Phenol
Answer :
Gibberellin
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100.
Crocus and Tulip flower shows response to
A
Water
B
Light
C
Temperature
D
Touch
Answer :
Temperature
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