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Q. No.During micropropagation, which PGR is used to initiate rooting in stem cuttings?
| 1. | Gibberellin | 2. | Ethylene |
| 3. | Cytokinin | 4. | Auxin |
Subtopic: Auxin Function |
83%
From NCERT
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Apical dominance is the phenomenon where the main central stem of the plant is dominant over (grows more vigorously than) the other side stems. Which hormone is responsible for apical dominance?
| 1. | Auxin | 2. | Gibberellin |
| 3. | Cytokinin | 4. | Ethylene |
Subtopic: Auxin Function |
95%
From NCERT
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How does pruning help in making the hedge dense?
| 1. | It induces the differentiation of new shoots from the rootstock |
| 2. | It frees axillary buds from apical dominance |
| 3. | The apical shoots grow faster after pruning |
| 4. | It releases wound hormones |
Subtopic: Auxin Function |
77%
From NCERT
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NEET 2025 - Target Batch
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NEET 2025 - Target Batch
Consider the given two statements:
| Assertion(A): | Synthetic auxin herbicides, including 2,4-dichlorophenoxyacetic acid (2,4-D) have been developed and used for broadleaf weed control. |
| Reason(R): | Auxins are toxic to plants in large concentrations; they are most toxic to dicots and less so to monocots. |
| 1. | (A) is True; (R) is False |
| 2. | Both (A) and (R) are True and (R) correctly explains (A) |
| 3. | (A) is False; (R) is True |
| 4. | Both (A) and (R) are True but (R) does not correctly explain (A) |
Subtopic: Auxin Function |
58%
From NCERT
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Q. No.
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