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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%
Level 3: 35%-60%
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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%
Level 2: 60%+
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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%
Level 3: 35%-60%
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Which plant growth regulators are terpenes?
| 1. | Indole-3-acetic acid |
| 2. | N6-furfurylamino purine |
| 3. | Abscisic acid |
| 4. | Gibberellic acid |
Subtopic: Growth Hormones & Auxin |
86%
Level 1: 80%+
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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%
Level 1: 80%+
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During mid-1960s, three independent researches reported the purification and chemical characterisation of three different kinds of inhibitors: inhibitor-B, abscission II and dormin. Later all the three were proved to be chemically identical. It was named:
1. Indole-3-acetic acid
2. N6-furfurylamino purine
3. Abscisic acid
4. Gibberellic acid
1. Indole-3-acetic acid
2. N6-furfurylamino purine
3. Abscisic acid
4. Gibberellic acid
Subtopic: Abscisic Acid |
93%
Level 1: 80%+
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Consider the given two statements:
| Statement I: | Auxins like NAA (naphthalene acetic acid) and 2, 4-D (2, 4-dichlorophenoxyacetic) have been isolated from plants. |
| Statement II: | IAA and indole butyric acid (IBA) are synthetic auxins. |
| 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 Hormones & Auxin |
83%
Level 1: 80%+
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Consider the two statements:
| Assertion(A): | Apical dominance is most likely adaptive. |
| Reason(R): | It is important for the plant to devote energy to growing upward so that it can get more light to undergo photosynthesis. |
| 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 Hormones & Auxin |
76%
Level 2: 60%+
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One of the first gibberellins to be discovered and also the one that remains the most intensively studied form is:
| 1. | GA1 | 2. | GA2 |
| 3. | GA3 | 4. | GA4 |
Subtopic: Gibberellin |
96%
Level 1: 80%+
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Consider the two statements:
| Assertion (A): | Gibberellins are used to increase the length of grape stalks. |
| Reason (R): | Gibberellins help overcome apical dominance. |
| 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: Gibberellin | Cytokinin |
80%
Level 1: 80%+
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