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Q. No.Consider the given two statements:
I:
The most widely used compound as source of ethylene is ethephon.
II:
Ethephon in an aqueous solution is readily absorbed and transported within the plant and releases ethylene slowly.
1.
Both I and II are correct and II explains I
2.
Both I and II are correct but II does not explain I
3.
I is correct but II is incorrect
4.
I is incorrect but II is correct
Subtopic: Ethylene |
85%
Level 1: 80%+
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Ethylene does not:
| 1. | induce flowering in mango |
| 2. | hasten fruit ripening in tomatoes and apples |
| 3. | retard abscission of flowers and fruits in cotton cherry and walnut |
| 4. | promote female flowers in cucumbers |
Subtopic: Ethylene |
71%
Level 2: 60%+
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Select the correct statements based on the information shown below in the diagrammatic representation of location of root apical meristem, shoot apical meristem and vascular cambium where the arrows exhibit the direction of growth of cells and organs:
| Statement I: | The root apical meristem and the shoot apical meristem are responsible for the primary growth of the plants and principally contribute to the elongation of the plants along their axis. |
| Statement II: | In dicots and gymnosperms, the lateral meristems, vascular cambium and cork-cambium appear later in life and cause the increase in the girth of the organs in which they are active. |
| 1. | Both Statement I and Statement II |
| 2. | Only Statement I |
| 3. | Only Statement II |
| 4. | Neither Statement I nor Statement II |
Subtopic: Differentiation, Dedifferentiation and Redifferentiation |
95%
Level 1: 80%+
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Based on the given diagram of root tip, which of the following statements will be true?
| I: | The region shown as A to G is the zone of elongation. |
| II: | The portion of the axis which is undergoing the phase of maturation lies more distal to the phase of elongation. |
| 1. Only I | 2. Only II |
| 3. Both I and II | 4. Neither I nor II |
Subtopic: Development |
Level 3: 35%-60%
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The given curve:
| I: | is characteristic of living organism growing in a natural environment. |
| II: | is typical for all cells, tissues and organs of a plant. |
| 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: Development |
76%
Level 2: 60%+
The diagram given shows hetrophylly in Larkspur. What will be true regarding this phenomenon?
1. Both I and II are true and II explains I.
2. Both I and II are true but II does not explain I.
3. I is correct and II is incorrect.
4. I is incorrect and II is correct.
| I: | It is more important for plants than most animals. |
| II: | Plants have open growth and development. |
1. Both I and II are true and II explains I.
2. Both I and II are true but II does not explain I.
3. I is correct and II is incorrect.
4. I is incorrect and II is correct.
Subtopic: Growth Model |
58%
Level 3: 35%-60%
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Which plant growth regulator will most likely be responsible for the peculiar effect on plant as shown in the given figure?
| 1. Auxins 2. Cytokinins 3. Gibberellins 4. Ethylene |
 |
Subtopic: Gibberellin |
72%
Level 2: 60%+
The given figure shows the effects of increasing concentration of a certain PGR on the growth of seven-day-old dark-grown pea seedlings. The effects include a decrease in epicotyl elongation, a thickening of the shoot and a change in orientation of growth from vertical to horizontal. Which PGR would be responsible for these effects?
| 1. | Auxins | 2. | Cytokinins |
| 3. | Gibberellins | 4. | Ethylene |
Subtopic: Growth Hormones & Auxin |
Level 3: 35%-60%
The diagram shows the schematic representation of an experiment that made bioassay of auxins possible. This experiment was done by:
| 1. | Darwin | 2. | Boysen Jenson |
| 3. | Paal | 4. | Went |
Subtopic: Auxin Function |
68%
Level 2: 60%+
Identify the correct statements regarding auxins?
1. Only I, II and III
2. Only I, III and IV
3. Only II, III and IV
4. I, II, III and IV
| I: | Auxin stimulates cell elongation by stimulating wall-loosening factors, such as expansins, to loosen cell walls. |
| II: | When auxin and cytokinin are applied to callus, rooting can be generated with higher auxin to cytokinin ratios, shoot growth is induced by lower auxin to cytokinin ratios. |
| III: | Auxin induces the formation and organization of phloem and xylem. |
| IV: | In low concentrations, auxin can inhibit ethylene formation and transport of precursor in plants; however, high concentrations can induce the synthesis of ethylene. |
1. Only I, II and III
2. Only I, III and IV
3. Only II, III and IV
4. I, II, III and IV
Subtopic: Auxin Function |
55%
Level 3: 35%-60%
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