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

Subtopic:  Growth Hormones & Auxin |
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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 |
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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 |
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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%
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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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How does pruning help in making the hedge dense?
1. It induces the differentiation of new shoots from the rootstock
2. It frees axillary buds from apical dominance
3. The apical shoots grow faster after pruning
4. It releases wound hormones

Subtopic:  Auxin Function |
 77%
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Treatment of seed at low temperature under moist conditions to break its dormancy is called 
1. scarification
2. vernalization
3. chelation
4. stratification

Subtopic:  Seed Dormancy (OLD NCERT) |

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