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Q. No.Heterophyllous development in response to environment is an example of which of the following phenomena ?
1. Dedifferentiation
2. Elasticity
3. Redifferentiation
4. Plasticity
1. Dedifferentiation
2. Elasticity
3. Redifferentiation
4. Plasticity
Subtopic: Development |
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Match List-I with List-II:
Choose the correct answer from the options given below :
| List-I (Growth Regulator) |
List-II (Function/Effect) |
||
| A. | 2,4-D | I. | Brewing industry |
| B. | \(GA_3\) | II. | Stimulation of stomatal closure |
| C. | Kinetin | III. | Herbicide |
| D. | ABA | IV. | Nutrient mobilisation |
Choose the correct answer from the options given below :
| 1. | A-IV, B-III, C-II, D-I |
| 2. | A-I, B-II, C-IV, D-III |
| 3. | A-III, B-I, C-IV, D-II |
| 4. | A-I, B-IV, C-III, D-II |
Subtopic: Miscellaneous |
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Which of the following plant growth regulators promotes internode elongation prior to flowering in cabbage?
| 1. | Ethephon | 2. | Abscisic acid |
| 3. | Gibberellin | 4. | Indole butyric acid |
Subtopic: Growth Hormones & Auxin |
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Which of the following plant growth regulators is used as herbicide ?
1. Gibberellin
2. 2,4-D
3. Kinetin
4. Abscisic acid
1. Gibberellin
2. 2,4-D
3. Kinetin
4. Abscisic acid
Subtopic: Growth Hormones & Auxin |
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Length of the stem at time 0 is 20 cm. The arithmetic growth rate is 30 cm per day. What is the length of the stem at the end of the 7th day ?
| 1. | 460 cm | 2. | 50 cm |
| 3. | 170 cm | 4. | 230 cm |
Subtopic: Growth | Growth Model |
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Read the following statements on plant growth and development.
Choose the option with all correct statements:
| A. | Parthenocarpy can be induced by auxins. |
| B. | Plant growth regulators can be involved in promotion as well as inhibition of growth |
| C. | Dedifferentiation is a pre-requisite for re-differentiation. |
| D. | Abscisic acid is a plant growth promoter. |
| E. | Apical dominance promotes the growth of lateral buds. |
Choose the option with all correct statements:
| 1. | A, D, E only | 2. | B, D, E only |
| 3. | A, B, C only | 4. | A, C, E only |
Subtopic: Auxin Function | Abscisic Acid | Differentiation, Dedifferentiation and Redifferentiation |
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NEET - 2025
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Which one of the following phytohormones promotes nutrient mobilization which helps in the delay of leaf senescence in plants?
| 1. | Gibberellin | 2. | Cytokinin |
| 3. | Ethylene | 4. | Abscisic acid |
Subtopic: Cytokinin |
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Auxin is used by gardeners to prepare weed-free lawns. But no damage is caused to grass as auxin
| 1. | promotes abscission of mature leaves only. |
| 2. | does not affect mature monocotyledonous plants. |
| 3. | can help in cell division in grasses, to produce growth. |
| 4. | promotes apical dominance |
Subtopic: Growth Hormones & Auxin | Auxin Function |
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Formation of interfascicular cambium from fully developed parenchyma cells is an example of
| 1. | Redifferentiation | 2. | Dedifferentiation |
| 3. | Maturation | 4. | Differentiation |
Subtopic: Differentiation, Dedifferentiation and Redifferentiation |
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Spraying sugarcane crop with which of the following plant growth regulators, increases the length of the stem, thus, increasing the yield?
| 1. | Gibberellin | 2. | Cytokinin |
| 3. | Abscisic acid | 4. | Auxin |
Subtopic: Gibberellin |
83%
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