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Q. No.Consider the given two statements:
| Assertion (A): | Plants retain the capacity for unlimited growth throughout their life. |
| Reason (R): | Meristems are present at certain locations in plant body. |
| 1. | Both (A) and (R) are True and (R) correctly explains the (A). |
| 2. | Both (A) and (R) are True but (R) does not correctly explain the (A). |
| 3. | (A) is True; (R) is False. |
| 4. | (A) is False; (R) is True. |
Subtopic: Growth | Growth Terminology | Development |
86%
From NCERT
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Plasticity in plant growth means that
1. Plant roots are extensible
2. Plant growth is dependent on the environment
3. Stems can extend
4. None of the above
Subtopic: Growth Terminology | Development |
88%
From NCERT
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NEET 2025 - Target Batch
Consider the given two statements:
| Assertion (A): | Plant growth is intimately linked to the water status of the plant while development is not. |
| Reason (R): | The plant cells grow in size by cell enlargement which in turn requires water. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 3. | (A) is True; (R) is False. |
| 4. | (A) is False; (R) is True. |
Subtopic: Growth |
50%
From NCERT
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Which of the following is ‘open’ in plants?
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: | Growth |
| II: | Development |
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 | Development |
72%
From NCERT
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Opening and closing of stomata in response to environmental conditions is mainly regulated by:
| 1. | gibberellins | 2. | cytokinins |
| 3. | abscisic acid | 4. | auxins |
Subtopic: Abscisic Acid |
87%
From NCERT
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How many of the given statements regarding auxins are true?
1. 2
2. 3
3. 4
4. 5
| I: | Auxins was first isolated from human urine. |
| II: | Auxins like IAA and indole butyric acid (IBA) have been isolated from plants. |
| III: | NAA (naphthalene acetic acid) and 2, 4-D (2, 4-dichlorophenoxyacetic) are synthetic auxins. |
| IV: | They help to initiate rooting in stem cuttings, an application widely used for plant propagation. |
| V: | They are widely used as herbicides. |
1. 2
2. 3
3. 4
4. 5
Subtopic: Growth Hormones & Auxin | Auxin Function |
76%
From NCERT
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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
In the light of the above statements choose the correct answer from the options given below:
| Assertion (A): | Growth, at a cellular level, is measured by a variety of parameters such as increase in fresh weight, dry weight, length, area, volume and cell number. |
| Reason (R): | Such parameters are more or less proportional to the increase in protoplasm which is primarily responsible for growth at cellular level. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Growth |
83%
From NCERT
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How many of the given pairs are correctly matched?
1. Only I and II
2. Only I and III
3. Only II and III
4. I, II and III
| I: | Indole compounds : IAA |
| II: | Adenine derivatives : kinetin |
| III: | Derivatives of carotenoids : GA3 |
1. Only I and II
2. Only I and III
3. Only II and III
4. I, II and III
Subtopic: Growth Hormones & Auxin |
71%
From NCERT
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The given figure shows an experimental set up associated with the discovery of:
1. Auxins
2. Gibberellins
3. Cytokinin
4. Ethylene
1. Auxins2. Gibberellins
3. Cytokinin
4. Ethylene
Subtopic: Growth Hormones & Auxin |
100%
From NCERT
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How many of the given statements are correct?
1. 1
2. 2
3. 3
4. 4
| I: | All Gibberellins are acidic. |
| II: | Gibberellins, cause a fruit like apple to elongate and improve its shape. |
| III: | Gibberellins delay senescence. |
| IV: | GA3 is used to speed up the malting process in brewing industry. |
1. 1
2. 2
3. 3
4. 4
Subtopic: Gibberellin |
80%
From NCERT
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