The living differentiated cells, that lost the capacity to divide anymore, can regain the capacity of division under certain conditions. This phenomenon is termed as:
1.
Redifferentiation
2.
Maturation
3.
Differentiation
4.
Dedifferentiation
Subtopic: Â Differentiation, Dedifferentiation and Redifferentiation |
 75%
Level 2: 60%+
NEET - 2022
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Which hormone is used to induce immediate stomatal closure in leaves?
1. Cytokinin
2. Gibberellin
3. Abscisic Acid
4. Auxin
Subtopic: Â Abscisic Acid |
 91%
Level 1: 80%+
NEET - 2022
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Removal of apical dominance by decapitation is utilised for:
| 1. | Suppressing the activity of intercalary meristem |
| 2. | Early senescence |
| 3. | Hedge making |
| 4. | Preparing weed-free lawns |
Subtopic: Â Growth Hormones & Auxin |Â Auxin Function |
 80%
Level 1: 80%+
NEET - 2022
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Growth:
| 1. | is defined as an irreversible permanent increase in size of an organ or its parts or even an individual cell. |
| 2. | Is accompanied by metabolic processes, both catabolic and anabolic . |
| 3. | Is accompanied only by anabolism . |
| 4. | More than one option is correct . |
Subtopic: Â Growth |
 76%
Level 2: 60%+
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Increased vacuolation, cell enlargement and new cell wall deposition are the characteristics of the cells of :
1. Elongation phase
2. Meristematic phase
3. Maturation phase
4. Differentiation phase
1. Elongation phase
2. Meristematic phase
3. Maturation phase
4. Differentiation phase
Subtopic: Â Growth |
 78%
Level 2: 60%+
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The arithmetic growth is exemplified by:
1. A root elongating at a constant rate
2. The equation, \(L_t = L_0 + rt\)
3. A linear curve is obtained graphically when the length of an organ is plotted against time
4. All of the above
1. A root elongating at a constant rate
2. The equation, \(L_t = L_0 + rt\)
3. A linear curve is obtained graphically when the length of an organ is plotted against time
4. All of the above
Subtopic: Â Growth Model |
 92%
Level 1: 80%+
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The exponential growth and arithmetic growth can be respectively expressed as:
1. \(W_1 = W_0e^{rt} ~, ~ L_t = L_0 +rt\)
2. \(L_t =L_0 +rt , W_1 = W_0e^{rt} \)
3. \(W_1 = W_0e^{rt} + L_0~, ~ L_t = rt+ W_0e^{rt}\)
4. \(W_1 = W_0e^{rt} ~, ~ W_1 = e^{rt}\)
1. \(W_1 = W_0e^{rt} ~, ~ L_t = L_0 +rt\)
2. \(L_t =L_0 +rt , W_1 = W_0e^{rt} \)
3. \(W_1 = W_0e^{rt} + L_0~, ~ L_t = rt+ W_0e^{rt}\)
4. \(W_1 = W_0e^{rt} ~, ~ W_1 = e^{rt}\)
Subtopic: Â Growth |Â Growth Model |
 90%
Level 1: 80%+
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The sigmoid growth and arithmetic growth can be represented graphically, respectively, as:
| 1. |  |
| 2. |  |
| 3. |  |
| 4. |  |
Subtopic: Â Growth Model |
 92%
Level 1: 80%+
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Observe the sigmoid curve given below and identify the phases A, B, and C:
| 1. | A = Initial slow growth, B = Rapid growth, C = Phase of growth during limited nutrient supply |
| 2. | A = Rapid growth, B = Initial slow growth, C = Phase of growth during limited nutrient supply |
| 3. | A = Lag phase, B = Stationary phase, C = Exponential phase |
| 4. | A = Exponential phase, B = Stationary phase, C = Lag phase |
Subtopic: Â Growth Model |
 85%
Level 1: 80%+
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Which of the following is incorrect?
| 1. | Conversion of shoot apical meristem into cortex is a case of differentiation |
| 2. | The non-living differentiated cells can regain the capacity of division which is called dedifferentiation |
| 3. | The formation of interfascicular cambium and cork cambium can occur from the fully differentiated parenchyma |
| 4. | Secondary xylem and phellem are the products of dedifferentiation |
Subtopic: Â Differentiation, Dedifferentiation and Redifferentiation |
Level 3: 35%-60%
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