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 |
 66%
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 |
 89%
From NCERT
AIPMT - 2007
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

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) |
 85%
AIPMT - 2008
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Which one of the following pairs is not correctly matched?

1. Abscisic acid - Stomatal closure
2. Gibberellic acid - Leaves fall
3. Cytokinin - Cell division
4. IAA - Cell wall elongation
Subtopic:  Gibberellin |
 73%
From NCERT
AIPMT - 2007
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

Parthenocarpic tomato fruits can be produced by:

1. removing androecium of flowers before pollen grains are released
2. treating the plants with low concentrations of gibberellic acid and auxins
3. raising the plants from vernalised seeds
4. treating the plants with phenylmercuric acetate

Subtopic:  Auxin Function | Gibberellin |
 68%
From NCERT
AIPMT - 2006
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

How does pruning help in making the hedge dense?

1. It includes the differentiation of new shoots from the rootstock
2. It frees axillary buds from apical dominance
3. The apical shoot grows faster after pruning
4. It releases wound hormones

Subtopic:  Auxin Function |
 62%
AIPMT - 2006
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Treatment of seed at low temperature under moist conditions to break its dormancy is called:

1. sacrification

2. vernalization

3. chelation

4. stratification

Subtopic:  Vernalization (OLD NCERT) |
AIPMT - 2006
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An enzyme that can stimulate the germination of barley seeds is:

1. α-amylase

2. lipase

3. protease

4. invertase

Subtopic:  Gibberellin |
 76%
AIPMT - 2006
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NEET 2023 - Target Batch - Aryan Raj Singh
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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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