The typical growth curve in plants is:

1. sigmoid
2. linear
3. stair-steps shaped
4. parabolic

Subtopic:  Growth Model |
 87%
From NCERT
NEET - 2015
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Dr. F. Went noted that if coleoptile tips were removed and placed on agar for one hour, the agar would produce a bending when placed on one side of freshly - cut coleoptile stumps. What is the significance of this experiment?
 

1. It made possible the isolation and exact identification of auxin.
2. It is the basis for the quantitative determination of small amounts of growth-promoting substances.
3. It supports the hypothesis that IAA is auxin.
4. It demonstrates the polar movements of auxins.

Subtopic:  Growth Hormones & Auxin |
AIPMT - 2014
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A few normal seedlings of a tomato were kept in a dark room. After a few days, they were found to have become white-coloured like albinos, Which of the following terms will you use to describe them?

1. Mutated

2. Embolised

3. Etiolated

4. Defoliated

Subtopic:  Development |
 67%
AIPMT - 2014
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Which one of the following growth regulators is known as the stress hormone?

1. Abscisic acid

2. Ethylene

3. GA3

4. Indole acetic acid

Subtopic:  Abscisic Acid |
 94%
From NCERT
AIPMT - 2014
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During seed germination its stored food is mobilized by:

1. Cytokinin

2. ABA

3. Gibberellin

4. Ethylene

Subtopic:  Gibberellin |
AIPMT - 2013
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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 |
 79%
AIPMT - 2010
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Photoperiodism was first characterized in:

1. tobacco

2. potato

3. tomato

4. cotton

Subtopic:  Photoperiodism (OLD NCERT) |
 74%
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 |
 84%
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 |
 71%
From NCERT
AIPMT - 2009
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh