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Q. No.Which of the following is not a function of the PGR ethylene?
1. Vertical growth of seedlings
2. Swelling of axis of dicot seedlings
3. Apical hook formation in dicot seedlings
4. Fruit ripening
Subtopic: Ethylene |
80%
From NCERT
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To differentiate into a tracheary element, a plant cell:
| I: | would lose its protoplasm |
| II: | develops a strong, elastic lignocellulosic secondary wall |
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: Differentiation, Dedifferentiation and Redifferentiation |
89%
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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Match each item in Column I with the one in Column II and select the correct match from the codes given:
Codes:
| COLUMN I [PGR] |
COLUMN II [Discovered by] |
||
| A | Auxin | P | F. W. Went |
| B | Gibberellic acid | Q | E. Kurosawa |
| C | Kinetin | R | Miller et al. |
| D | Ethylene | S | H. H, Cousins |
| A | B | C | D | |
| 1. | P | Q | R | S |
| 2. | Q | P | S | R |
| 3. | R | S | Q | P |
| 4. | S | R | P | Q |
Subtopic: Growth Hormones & Auxin |
91%
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: | Development in plants is the sum of two processes: growth and differentiation. |
| Statement II: | The development of a mature plant from a zygote (fertilised egg) follows a precise and highly ordered succession of events. |
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 |
92%
From NCERT
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Growth 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: | can be defined as an irreversible permanent increase in size of an organ or its parts or even of an individual cell. |
| II: | is accompanied by metabolic processes, only anabolic and not catabolic, that occur at the expense of energy. |
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 Terminology |
85%
From NCERT
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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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The exponential growth can be expressed as:
1. W1 = W0 ert
2. W1 = W0 + ert
3. W1 = W0 – ert
4. W1 = W0/ ert
1. W1 = W0 ert
2. W1 = W0 + ert
3. W1 = W0 – ert
4. W1 = W0/ ert
Subtopic: Growth Model |
93%
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 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 PGR, although can be included in the group of both growth promoters and growth inhibitors in plants, is largely an inhibitor of growth activities?
1. Auxins
2. Gibberellins
3. Ethylene
4. Abscisic acid
1. Auxins
2. Gibberellins
3. Ethylene
4. Abscisic acid
Subtopic: Gibberellin |
87%
From NCERT
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