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 |
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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 |
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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 |
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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 |
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From NCERT
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The sigmoid growth and arithmetic growth can be represented graphically, respectively, as:
| 1. |  |
| 2. |  |
| 3. |  |
| 4. |  |
Subtopic: Â Growth Model |
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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: Â Growth Model |
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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: Â Differentiation, Dedifferentiation and Redifferentiation |
From NCERT
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The phenomenon of heterophily:
| 1. | Is found in cotton, coriander, larkspur and buttercup |
| 2. | Is an example of platicity |
| 3. | Occurs as a result of development or in response to environment |
| 4. | All are correct |
Subtopic: Â Development |
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From NCERT
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The intrinsic factor influencing the development in plants is:
1. \(O_2\)
2. \(H_2O\)
3. \(CO_2\) and nutrition
4. Plant growth regulators
1. \(O_2\)
2. \(H_2O\)
3. \(CO_2\) and nutrition
4. Plant growth regulators
Subtopic: Â Growth Hormones & Auxin |
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From NCERT
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Match the columns:
1. A = (i) , B =(ii) , C = (iii) , D= (iv)
2. A = (iv) , B =(iii) , C = (i) , D= (ii)
3. A = (ii) , B =(iii) , C = (iv) , D= (i)
4. A = (ii) , B =(iii) , C = (i) , D= (iv)
| Column I | Column II | ||
| A. | Adenine derivative | (i) | Ethylene |
| B. | Terpenes | (ii) | Kinetin |
| C. | Gaseous hormone | (iii) | GA |
| D. | Caroteinoid derivative | (iv) | ABA |
2. A = (iv) , B =(iii) , C = (i) , D= (ii)
3. A = (ii) , B =(iii) , C = (iv) , D= (i)
4. A = (ii) , B =(iii) , C = (i) , D= (iv)
Subtopic: Â Growth Hormones & Auxin |
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From NCERT
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