A short day plant is continuously projected with red light during night period before flowering stages. It will :
1. Finally flower
2. Finally remain vegetative
3. Die
4. Show abnormally increase in the number of flowers
Subtopic: Â Photoperiodism (OLD NCERT) |
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Given below is the representation of the effect of interruption of dark period in a short day plant (SDP). Correctly identify the results of A,B, C and D
A B C D
1. Vegetative Vegetative Flowering Flowering
2. Flowering Flowering Vegetative Vegetative
3. Flowering Vegetative Flowering Vegetative
4. Vegetative Flowering Vegetative Flowering
A B C D
1. Vegetative Vegetative Flowering Flowering
2. Flowering Flowering Vegetative Vegetative
3. Flowering Vegetative Flowering Vegetative
4. Vegetative Flowering Vegetative Flowering
Subtopic: Â Photoperiodism (OLD NCERT) |
 53%
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Match the columns:
1. A = (i) , B =(ii) , C= (iv) , D=(iii)
2. A = (i) , B =(iii) , C= (ii) , D=(iv)
3. A = (iii) , B =(iv) , C= (ii) , D=(i)
4. A = (ii) , B =(iv) , C= (i) , D=(iii)
| Column -I | Column-II | ||
| A. | Substitute of vernalisation | (i) | High temperature |
| B. | Critical photoperiod | (ii) | ABA |
| C. | Stress hormone | (iii) | Gibberellin |
| D. | Devernalisation | (iv) | SDP and LDP |
1. A = (i) , B =(ii) , C= (iv) , D=(iii)
2. A = (i) , B =(iii) , C= (ii) , D=(iv)
3. A = (iii) , B =(iv) , C= (ii) , D=(i)
4. A = (ii) , B =(iv) , C= (i) , D=(iii)
Subtopic: Â Gibberellin |Â Abscisic Acid |Â Photoperiodism (OLD NCERT) |Â Vernalization (OLD NCERT) |
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Assertion: A correct concentration of auxin and cytokinin is required for the development of root and shoot in a callus
Reason: When the ratio of auxin to cytokinin is high, then only roots develop but when the ratio of cytokinin to auxin is high then only shoots develop
1. If both assertion and reason are true and the reason is the correct explanation of the assertion
2. If both assertion and reason are true but the reason is not the correct explanation of the assertion
3. If assertion is true but reason is false
4. If both assertion and reason are false statements
Reason: When the ratio of auxin to cytokinin is high, then only roots develop but when the ratio of cytokinin to auxin is high then only shoots develop
1. If both assertion and reason are true and the reason is the correct explanation of the assertion
2. If both assertion and reason are true but the reason is not the correct explanation of the assertion
3. If assertion is true but reason is false
4. If both assertion and reason are false statements
Subtopic: Â Growth Hormones & Auxin |
 69%
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Assertion: Vernalization is the acceleration of subsequent flowering by low-temperature treatment.
Reason: The site of vernalization is apical meristem.
1. If both assertion and reason are true and the reason is the correct explanation of the assertion
2. If both assertion and reason are true but the reason is not the correct explanation of the assertion
3. If the assertion is true but the reason is false
4. If both assertion and reason are false statements
Reason: The site of vernalization is apical meristem.
1. If both assertion and reason are true and the reason is the correct explanation of the assertion
2. If both assertion and reason are true but the reason is not the correct explanation of the assertion
3. If the assertion is true but the reason is false
4. If both assertion and reason are false statements
Subtopic: Â Vernalization (OLD NCERT) |
 51%
From NCERT
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Assertion: Cytokinin increases shelf life of fruits and vegetables
Reason: Cytokinins induce cell division
1. If both assertion and reason are true and the reason is the correct explanation of the assertion
2. If both assertion and reason are true but the reason is not the correct explanation of the assertion
3. If assertion is true but reason is false
4. If both assertion and reason are false statements
Reason: Cytokinins induce cell division
1. If both assertion and reason are true and the reason is the correct explanation of the assertion
2. If both assertion and reason are true but the reason is not the correct explanation of the assertion
3. If assertion is true but reason is false
4. If both assertion and reason are false statements
Subtopic: Â Cytokinin |
 56%
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Assertion: ABA is also called stress hormone
Reason: ABA increases the tolerance of plants to various kinds of stresses
1. If both assertion and reason are true and the reason is the correct explanation of the assertion
2. If both assertion and reason are true but the reason is not the correct explanation of the assertion
3. If assertion is true but reason is false
4. If both assertion and reason are false statements
Reason: ABA increases the tolerance of plants to various kinds of stresses
1. If both assertion and reason are true and the reason is the correct explanation of the assertion
2. If both assertion and reason are true but the reason is not the correct explanation of the assertion
3. If assertion is true but reason is false
4. If both assertion and reason are false statements
Subtopic: Â Abscisic Acid |
 93%
From NCERT
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| Assertion: | Development is the sum total of growth and differentiation. |
| Reason: | Development is controlled by extrinsic factors as well as intrinsic factors. |
| 1. | Both assertion and reason are true and the reason is the correct explanation of the assertion. |
| 2. | Both assertion and reason are true but the reason is not the correct explanation of the assertion. |
| 3. | Assertion is true but the reason is false. |
| 4. | Both assertion and reason are false statements. |
Subtopic: Â Development |
 71%
From NCERT
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Assertion: Ethylene can either act as a growth promoter or inhibitor
Reason: Ethylene helps in breaking the dormancy of seeds and buds and is also responsible for the senescence of plant parts like leaves and flower
1. If both assertion and reason are true and the reason is the correct explanation of the assertion
2. If both assertion and reason are true but the reason is not the correct explanation of the assertion
3. If assertion is true but reason is false
4. If both assertion and reason are false statements
Reason: Ethylene helps in breaking the dormancy of seeds and buds and is also responsible for the senescence of plant parts like leaves and flower
1. If both assertion and reason are true and the reason is the correct explanation of the assertion
2. If both assertion and reason are true but the reason is not the correct explanation of the assertion
3. If assertion is true but reason is false
4. If both assertion and reason are false statements
Subtopic: Â Ethylene |
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Assertion: GA3 can be used to speed up the malting process in brewing industry
Reason: Gibberellin is synthesised only by some fungi
1. If both assertion and reason are true and the reason is the correct explanation of the assertion
2. If both assertion and reason are true but the reason is not the correct explanation of the assertion
3. If assertion is true but reason is false
4. If both assertion and reason are false statements
Reason: Gibberellin is synthesised only by some fungi
1. If both assertion and reason are true and the reason is the correct explanation of the assertion
2. If both assertion and reason are true but the reason is not the correct explanation of the assertion
3. If assertion is true but reason is false
4. If both assertion and reason are false statements
Subtopic: Â Gibberellin |
 64%
From NCERT
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