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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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 |
Subtopic: Â Growth Hormones & Auxin |
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From NCERT
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Match the columns:
| Column I | Column II | ||
| A. | Adenine derivative | (i) | Ethylene |
| B. | Terpenes | (ii) | Kinetin |
| C. | Gaseous hormone | (iii) | GA |
| D. | Caroteinoid derivative | (iv) | ABA |
| 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) |
Subtopic: Â Growth Hormones & Auxin |
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