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Q. No.Apical dominance in plants can be overcome by the application of the PGR:
1. Cytokinin
2. Ethylene
3. ABA
4. Gibberellins
Subtopic: Cytokinin |
85%
From NCERT
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Spraying sugarcane crops with which of the following plant growth regulators increases the stem's length, thus increasing the yield by as much as 20 tonnes per acre?
1. Auxins
2. Gibberellins
3. Cytokinins
4. ABA
1. Auxins
2. Gibberellins
3. Cytokinins
4. ABA
Subtopic: Auxin Function |
90%
From NCERT
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In plants:
I: Growth is open
II: Differentiation is open
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 is open
II: Differentiation is open
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 |
76%
From NCERT
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Which plant growth regulator is used to initiate flowering and synchronising fruit-set in pineapples?
1. Gibberellins
2. Cytokinins
3. ABA
4. Ethylene
Subtopic: Ethylene |
84%
From NCERT
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Seed dormancy can be due to the presence of chemical inhibitors which include all the following except:
1. abscisic acids
2. phenolic acids
3. para-ascorbic acid
4. gibberellic acid
Subtopic: Seed Dormancy (OLD NCERT) |
85%
From NCERT
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Which PGR stimulates the closure of stomata and increases the tolerance of plants to various kinds of stresses?
1. Abscisic acid
2. Ethylene
3. Auxins
4. Cytokinins
Subtopic: Abscisic Acid |
94%
From NCERT
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Consider the given two statements:
| Assertion(A): | Plant growth is intimately linked to the water status of the plant. |
| Reason(R): | The plant cells grow in size by cell enlargement, which in turn requires water. |
| 1. | (A) is True but (R) is False |
| 2. | Both (A) and (R) are True and (R) correctly explains (A) |
| 3. | Both (A) and (R) are True and but (R) does not correctly explain (A) |
| 4. | (A) is False but (R) is True |
Subtopic: Growth |
85%
From NCERT
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All the following plants exhibit difference in shape of leaves in juvenile and in mature phase of their life cycle except:
1. Cotton
2. Coriander
3. Larkspur
4. Buttercup
1. Cotton
2. Coriander
3. Larkspur
4. Buttercup
Subtopic: Development |
77%
From NCERT
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All the following are known functions of the plant growth regulator auxins except:
1. Promotion of flowering in pineapples
2. Induction of parthenocarpy in tomatoes
3. Fruit ripening in tomatoes
4.`Initiation of rooting in stem cuttings
1. Promotion of flowering in pineapples
2. Induction of parthenocarpy in tomatoes
3. Fruit ripening in tomatoes
4.`Initiation of rooting in stem cuttings
Subtopic: Growth Hormones & Auxin | Ethylene |
84%
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Regarding plant growth regulators:
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
| I: | Auxins are plant growth promoters |
| II: | ABA is a plant growth inhibitor |
| III: | Ethylene is largely an inhibitor of growth activities |
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
Subtopic: Growth Hormones & Auxin |
85%
From NCERT
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