Which one of the following growth regulators is known as "stress hormone" ?
1. Abscisic acid
2. Ethylene
3. GA3 
4. lndole acetic acid

Subtopic:  Abscisic Acid |
 91%
From NCERT
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During seed germination, its stored food is mobilised by:

1.ethylene2.cytokinin
3.ABA4.gibberellin

Subtopic:  Gibberellin |
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Phototropic curvature is the result of uneven distribution of.
1. gibberellin
2. phytochrome
3. cytokinins
4. auxin

Subtopic:  Growth Hormones & Auxin |
 80%
From NCERT
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Coiling of garden pea tendrils around any support is an example of
1. thigmotaxis
2. thigmonasty
3. thigmotropism
4. thermotaxis

Subtopic:  Growth |
 67%
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One of the synthetic auxin is

1. NAA 2. IAA
3. GA 4. IBA
Subtopic:  Auxin Function |
 81%
From NCERT
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Which one of the following acids is a derivative of carotenoids?

1.Indole-butyric acid2.Indole-3-acetic acid
3.Gibberellic acid4.Abscisic acid
Subtopic:  Abscisic Acid |
 67%
From NCERT
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Importance of day length in flowering of plants was first shown in
1. Lemna
2. tobacco
3. cotton
4. Petunia

Subtopic:  Photoperiodism (OLD NCERT) |
 79%
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Opening of floral buds into flowers, is a type of:-
1. autonomic movement of locomotion
2. autonomic movement of variation
3. paratonic movement of growth
4. autonomic movement of growth

Subtopic:  Growth |
 70%
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“Foolish seedling" disease of rice led to the discovery of:-

1.GA2.ABA
3.2,4-D4.IAA

Subtopic:  Gibberellin |
 88%
From NCERT
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Which one of the following pairs, is not correctly matched?
1. Abscisic acid - Stomatal closure
2. Gibberellic acid - Leaf fall
3. Cytokinin - Cell division
4. IAA - Cell wall elongation

Subtopic:  Gibberellin |
 82%
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