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Q. No.Which of the following phytohormones is a derivative of carotenoids?
1. Auxin
2. ABA
3. Ethylene
4. Cytokinin
Subtopic: Growth Hormones & Auxin |
78%
From NCERT
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Match the following (Column I with Column II)
| Column I | Column II | ||
| a | Ethephon | (i) | GA |
| b | Terpene | (ii) | Ethylene |
| c | Zeath | (iii) | Natural auxin |
| d | IAA | (iv) | Cytokinin |
| 1. | a(ii), b(i), c(iii), d(iv) |
| 2. | a(ii), b(i), c(iv), d(iii) |
| 3. | a(iv), b(ii), c(iii), d(iv) |
| 4. | a(i), b(ii), c(iii), d(iv) |
Subtopic: Growth Hormones & Auxin | Gibberellin | Cytokinin |
87%
From NCERT
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Match the following (Column I with Column II)
| Column I | Column II | ||
| a | Weedicide | (i) | GA3 |
| b | Bolting | (ii) | Cytokinin |
| c | Thinning of cotton | (iii) | Ethylene |
| d | Lateral shoot growth | (iv) | 2,4-D |
| 1. | a(iii), b(ii), c(iv), d(i) |
| 2. | a(iv), b(i), c(iii), d(ii) |
| 3. | a(iv), b(i), c(ii), d(iii) |
| 4. | a(iv), b(ii), c(iii), d(i) |
Subtopic: Growth Hormones & Auxin | Gibberellin | Cytokinin | Ethylene |
80%
From NCERT
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Dormancy of seeds is broken by ethylene whereas it is induced by
1. Abscisic acid
2. Auxin
3. Cytokinin
4. Gibberellic acid
1. Abscisic acid
2. Auxin
3. Cytokinin
4. Gibberellic acid
Subtopic: Ethylene | Abscisic Acid |
79%
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The plant hormone which closes the stomata in stressful conditions is
1. Cytokinin
2. Ga
3. Auxin
4. ABA
1. Cytokinin
2. Ga
3. Auxin
4. ABA
Subtopic: Abscisic Acid |
93%
From NCERT
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Both ethylene and ABA are responsible for
| 1. | Promoting the abscission of leaves and fruits |
| 2. | Inducing dormancy of seeds |
| 3. | Stimulation of apical dominance |
| 4. | Ripening |
Subtopic: Ethylene | Abscisic Acid |
64%
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_________ is a period when growth and development is temporarily stopped.
1. Dormancy
2. Abscission
3. Senescence
4. Validation
1. Dormancy
2. Abscission
3. Senescence
4. Validation
82%
From NCERT
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Florigen results in the conversion of
| 1. | Reproductive bud | → Vegetative bud |
| 2. | Shoot apex | → Flowering bud |
| 3. | Root apex | → Reproductive bud |
| 4. | Vegetative bud | → Lateral shoot |
Subtopic: Growth Hormones & Auxin |
69%
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Which type of plants can blossom throughout the year?
1. Long-day plants
2. Short-long day plants
3. Short-day plants
4. Day-neutral plants
1. Long-day plants
2. Short-long day plants
3. Short-day plants
4. Day-neutral plants
73%
From NCERT
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Which of the following is an example of short-day plant?
1. Tobacco
2. Sugarbeet
3. Wheat
4. Radish
1. Tobacco
2. Sugarbeet
3. Wheat
4. Radish
62%
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