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Q. No.The efficiency index in the geometric growth equation W1 = W0 ert is denoted by:
1. W0
2.W1
3. r
4. e
Subtopic: Growth Model |
82%
From NCERT
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Quantitative comparisons between the growth of living system can be made in two ways where:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | measurement and the comparison of total growth per unit time is called the absolute growth rate. |
| II: | the growth of the given system per unit time expressed on a common basis, e.g., per unit initial parameter is called the relative growth rate. |
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Growth | Growth Model | Growth Terminology | Development |
91%
From NCERT
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In plants, during growth and development:
| I: | Turgidity of cells helps in extension growth. |
| II: | Water provides the medium for enzymatic activities needed for growth. |
| III: | Oxygen helps in releasing metabolic energy essential for growth activities. |
| IV: | Nutrients (macro and micro essential elements) are required for the synthesis of protoplasm and act as source of energy. |
| 1. | Only I, II and III are correct |
| 2. | Only I, III and IV are correct |
| 3. | Only II, III and IV are correct |
| 4. | I, II, III and IV are correct |
Subtopic: Growth | Growth Terminology | Differentiation, Dedifferentiation and Redifferentiation |
89%
From NCERT
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When a cell in plants differentiates to form a tracheary element:
| I: | it would gain a lot of protoplasm. |
| II: | it develops a very strong, elastic, lignocellulosic secondary cell walls. |
| 1. | Only I is correct |
| 2. | Only II is correct |
| 3. | Both I and II are correct |
| 4. | Both I and II are incorrect |
Subtopic: Growth Model | Differentiation, Dedifferentiation and Redifferentiation |
72%
From NCERT
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Which of the following is not formed as result of re-differentiation in plants?
| 1. | Cork cambium | 2. | Phellem |
| 3. | Periderm | 4. | Secondary xylem |
Subtopic: Differentiation, Dedifferentiation and Redifferentiation |
65%
From NCERT
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The examples of de-differentiation in plants include:
| I: | Formation of a tumour. |
| II: | Parenchyma cells made to divide under controlled laboratory conditions during plant tissue culture. |
| 1. | Only I | 2. | Only II |
| 3. | Both I and II | 4. | Neither I nor II |
Subtopic: Growth Terminology | Development | Differentiation, Dedifferentiation and Redifferentiation |
62%
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Consider the given two statements:
| Statement I: | In cotton, coriander, and larkspur, differences in the shapes of leaves produced in air and those produced in water represent heterophyllous development due to environment. |
| Statement II: | In buttercup, the leaves of the juvenile plant are different in shape from those in mature plants. |
| 1. | Statement I is correct; Statement II is incorrect |
| 2. | Statement I is correct; Statement II is correct |
| 3. | Statement I is incorrect; Statement II is incorrect |
| 4. | Statement I is incorrect; Statement II is correct |
Subtopic: Development |
56%
From NCERT
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Auxin was isolated from tips of coleoptiles of oat seedlings by:
1. Charles Darwin
2. F. W. Went
3. Boysen and Jensen
4. Francis Darwin
1. Charles Darwin
2. F. W. Went
3. Boysen and Jensen
4. Francis Darwin
Subtopic: Growth Hormones & Auxin |
93%
From NCERT
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The ‘bakanae’ (foolish seedling) disease of rice seedlings is associated with the discovery of:
1. Auxins
2. Gibberellins
3. Ethylene
4. Abscisic acid
1. Auxins
2. Gibberellins
3. Ethylene
4. Abscisic acid
Subtopic: Gibberellin |
96%
From NCERT
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F. Skoog and his co-workers observed that from the internodal segments of tobacco stems the callus proliferated only if extracts of vascular tissues or yeast extract or coconut milk or DNA supplements the medium already containing:
1. Auxins
2. Gibberellins
3. Ethylene
4. Kinetins
1. Auxins
2. Gibberellins
3. Ethylene
4. Kinetins
Subtopic: Growth Hormones & Auxin |
From NCERT
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