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Q. No.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: Differentiation, Dedifferentiation and Redifferentiation |
73%
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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: Abscisic Acid |
89%
From NCERT
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: Growth Hormones & Auxin | Auxin Function |
79%
From NCERT
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
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: Growth |
75%
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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: Growth |
75%
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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: Growth Model |
91%
From NCERT
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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: Growth | Growth Model |
89%
From NCERT
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The sigmoid growth and arithmetic growth can be represented graphically, respectively, as:
| 1. |  |
| 2. |  |
| 3. |  |
| 4. |  |
Subtopic: Growth Model |
91%
From NCERT
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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: Growth Model |
83%
From NCERT
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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: Differentiation, Dedifferentiation and Redifferentiation |
From NCERT
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