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Q. No.Production of cucumber has increased manifold in recent years. Application of which of the following phytohormones has resulted in this increased yield as the hormone is known to produce female flowers in plants?
1.
Cytokinin
2.
ABA
3.
Gibberellin
4.
Ethylene
Subtopic: Ethylene |
80%
Level 1: 80%+
NEET - 2022
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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 |
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: Abscisic Acid |
90%
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: Growth Hormones & Auxin | Auxin Function |
79%
Level 2: 60%+
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: 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: 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 |
Subtopic: Growth Model |
91%
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: Growth | Growth Model |
89%
Level 1: 80%+
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The sigmoid growth and arithmetic growth can be represented graphically, respectively, as:
| 1. |  |
| 2. |  |
| 3. |  |
| 4. |  |
Subtopic: Growth Model |
90%
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: Growth Model |
84%
Level 1: 80%+
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