Q. No.NCERT textbook says that plant growth is unique. What is the character of plant growth being referred to?
1. Plants have a closed growth
2. Capacity of unlimited growth throughout life
3. Complete absence of growth after a certain age
4. Growth without development
Subtopic: Growth | Growth Model |
89%
From NCERT
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Consider the given two statements:
| Assertion (A): | Unlike animals, plants retain the capacity for unlimited growth throughout their life. |
| Reason (R): | Unlike animals, there is presence of meristems at certain locations in their body. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | (A) is True; (R) is False |
| 3. | (A) is False; (R) is False |
| 4. | Both (A) and (R) are True but (R) does not correctly explain (A). |
Subtopic: Growth Model |
86%
From NCERT
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Consider the given two statements:
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
| Statement I: | The root apical meristem and the shoot apical meristem are responsible for the primary growth of the plants and cause the increase in the girth of the organs in which they are active. |
| Statement II: | In dicotyledonous plants and gymnosperms, the lateral meristems, vascular cambium and cork-cambium principally contribute to the elongation of the plants along their axis. |
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: Growth | Growth Model | Development | Differentiation, Dedifferentiation and Redifferentiation |
75%
From NCERT
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What would not be true for the cells in the meristematic region at the root apex?
| 1. | They are constantly dividing cells. |
| 2. | They are rich in protoplasm, possess large conspicuous nuclei. |
| 3. | Their cell walls are primary in nature. |
| 4. | Plasmodesmatal connections between the cells are absent. |
Subtopic: Growth | Growth Model | Development |
88%
From NCERT
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Consider the given two statements:
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
| Statement I: | In geometric growth, following mitotic cell division, only one daughter cell continues to divide while the other differentiates and matures. |
| Statement II: | In arithmetic growth, both the progeny cells following mitotic cell division retain the ability to divide and continue to do so. |
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: Growth | Growth Model |
81%
From NCERT
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The difference between arithmetic and geometric growth in plants is that:
| 1. | Arithmetic growth involves an increase in size only, while geometric growth involves an increase in number |
| 2. | In arithmetic growth, one daughter cell continues to divide, while in geometric growth, both do |
| 3. | Arithmetic growth is exponential, while geometric growth is linear |
| 4. | Geometric growth involves cell division and enlargement, while arithmetic growth involves only division |
Subtopic: Growth Model |
91%
From NCERT
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The exponential growth in plants can be expressed as: W1 = W0ert where ‘e’ denotes:
1. Initial size at the beginning of the period
2. base of natural logarithms
3. growth rate/elongation per unit time
4. time of growth
1. Initial size at the beginning of the period
2. base of natural logarithms
3. growth rate/elongation per unit time
4. time of growth
Subtopic: Growth Model |
92%
From NCERT
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Mathematically, arithmetic growth in plants is expressed as:
| 1. | Lt = L0 + rt | 2. | Lt = L0 X rt |
| 3. | Lt = L0 / rt | 4. | Lt = L0 - rt |
Subtopic: Growth Model |
95%
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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The efficiency index in the geometric growth equation W1 = W0 ert is denoted by:
1. W0
2.W1
3. r
4. e
1. W0
2.W1
3. r
4. e
Subtopic: Growth Model |
83%
From NCERT
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