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Q. No.Which of the following adenine derivatives may behave as an antagonist to indole compounds?
1. Kinetin
2. 2, 4-D
3. IAA
4. NAA
Subtopic: Growth Hormones & Auxin | Abscisic Acid |
82%
From NCERT
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"Certain region of plant shows tumourous growth". This is a result of
1. Differentiation
2. Dedifferentiation
3. Redifferentiation
4. Both Differentiation and redifferentiation
1. Differentiation
2. Dedifferentiation
3. Redifferentiation
4. Both Differentiation and redifferentiation
Subtopic: Growth | Differentiation, Dedifferentiation and Redifferentiation |
57%
From NCERT
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"Cells positioned away from root apical meristem differentiate as root cap cells, while those pushed to the periphery mature as epidermis". This is evidence for
1. Open form of differentiation in plants
2. Closed form of differentiation in plants
3. Closed form dedifferentiation in plants
4. Open form of dedifferentiation in plants
1. Open form of differentiation in plants
2. Closed form of differentiation in plants
3. Closed form dedifferentiation in plants
4. Open form of dedifferentiation in plants
Subtopic: Growth | Differentiation, Dedifferentiation and Redifferentiation |
75%
From NCERT
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Which of the following elements for growth does not affect all phases of growth?
1. Light
2. Water
3. Oxygen
4. Temperature
1. Light
2. Water
3. Oxygen
4. Temperature
Subtopic: Growth |
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In arithmetic growth, which of the following features is not found?
| 1. | One cell per generation is added |
| 2. | r represents elongation per unit of time |
| 3. | Exhibit the J-shape curve on the graph |
| 4. | Elongation of the root is an example of this type of growth |
Subtopic: Growth |
80%
From NCERT
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The efficiency index can be calculated by which of the following equations?
1. \(L_t = L_0 +rt\)
2. \(W_1 = W_0e^{rt}\)
3. \(W_1 = W_0+e^{rt}\)
4. \(L_t = L_0 /e^{rt}\)
1. \(L_t = L_0 +rt\)
2. \(W_1 = W_0e^{rt}\)
3. \(W_1 = W_0+e^{rt}\)
4. \(L_t = L_0 /e^{rt}\)
Subtopic: Growth |
71%
From NCERT
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Which of the following shapes will be required by the growth curve of a tree showing seasonal activity?
1. S-shape
2. Ladder shape
3. J-shape
4. Parabolic shape
1. S-shape
2. Ladder shape
3. J-shape
4. Parabolic shape
Subtopic: Growth |
71%
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On the first day of observation, leaf A shows 40 cm2 area and leaf B shows 50 cm2 area. On the following day, the area of leaf A becomes 44 cm2 and the area of leaf B becomes 55 cm2. Which of the following conclusions can be drawn about the growth rate of leaf A and B?
| 1. | The absolute growth rate is the same but the relative growth rate is different for A and B |
| 2. | The absolute growth rate is different but the relative growth rate is the same for A and B |
| 3. | Both absolute and relative growth rates are the same for A and B |
| 4. | Both absolute and relative growth rates are different for A and B |
Subtopic: Growth |
61%
From NCERT
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The region at the distal end of the highly vacuolated cell in the root represents:
1. Zone of meristematic activity
2. Zone of elongation
3. Zone of maturation
4. Zone of differentiation
1. Zone of meristematic activity
2. Zone of elongation
3. Zone of maturation
4. Zone of differentiation
Subtopic: Growth |
From NCERT
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Which of the following growth parameter will be used to measure growth in an isobilateral leaf?
1. Increase in length
2. Increase in surface area
3. Increase in volume
4. Increase in cell number
1. Increase in length
2. Increase in surface area
3. Increase in volume
4. Increase in cell number
Subtopic: Growth |
80%
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