Phototropic curvature is the result of uneven distribution of:

1. gibberellin

2. phytochrome

3. cytokinins

4. auxin

Subtopic:  Growth Hormones & Auxin |
 79%
AIPMT - 2010
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Photoperiodism was first characterized in:

1. tobacco

2. potato

3. tomato

4. cotton

Subtopic:  Photoperiodism (OLD NCERT) |
 73%
AIPMT - 2010
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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 | Development |
 69%
AIPMT - 2010
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One of the synthetic auxin is:

1. NAA

2. IAA

3. GA

4. IBA

Subtopic:  Growth Hormones & Auxin | Auxin Function |
 85%
From NCERT
AIPMT - 2009
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Which one of the following acids is a derivative of carotenoids?

1. Indole-butyric acid

2. Indole-3-acetic acid

3. Gibberellic acid

4. Abscisic acid

Subtopic:  Abscisic Acid |
 72%
From NCERT
AIPMT - 2009
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Senescence as an active developmental cellular process in the growth and functioning of a flowering plant, is indicated in:

1. vessels and tracheid differentiation

2. leaf abscission

3. annual plants

4. floral parts.

Subtopic:  Auxin Function | Cytokinin | Ethylene | Abscisic Acid |
 67%
AIPMT - 2008
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The 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 Terminology | Development |
 65%
AIPMT - 2007
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The wavelength of light absorbed by Pr form of phytochrome is:

1. 640 nm

2. 680 nm

3. 720 nm

4. 620 nm

Subtopic:  Photoperiodism (OLD NCERT) |
AIPMT - 2007
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"Foolish seedling" disease of rice led to the discovery of:

1. GA

2. ABA

3. 2, 4-D

4. IAA

Subtopic:  Gibberellin |
 90%
From NCERT
AIPMT - 2007
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Importance of day length in the flowering of plants was first shown in:

1. Lemma

2. tobacco

3. cotton

4. Petunia

Subtopic:  Photoperiodism (OLD NCERT) |
 84%
AIPMT - 2008
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