Identify the incorrectly matched pair:
Scientist | PGR discovery | |
1. | Cousins | Ethylene |
2. | Kurosawa | Gibberellin |
3. | Skoog and Miller | ABA |
4. | F. W. Went | Auxin |
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To extend their market period, fruits can be left on trees longer by the application of:
1. | Auxin | 2. | Gibberellins |
3. | Cytokinin | 4. | ABA |
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In most situations, which PGR acts as an antagonist to GAs?
1. | ABA | 2. | Ethylene |
3. | Cytokinin | 4. | Giberrellin |
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Match the following :
A. IAA | i. Herring sperm DNA |
B. ABA | ii. Bolting |
C. Ethylene | iii. Stomatal closure |
D. GA | iv. Weed-free lawns |
E. Cytokinins | v. Ripening of fruits |
Options:
A | B | C | D | E | |
1. | iv | iii | v | ii | i |
2. | v | iii | iv | ii | i |
3. | iv | i | v | iii | ii |
4. | v | iii | ii | i | iv |
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To promote stem elongation, gibberellins act in concert with:
1. Auxins | 2. Cytokinins |
3. Ethylene | 4. ABA |
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I: | Spraying sugarcane crop with gibberellins increases the yield by as much as 20 tonnes per acre. |
II: | Sugarcane stores carbohydrates as sugar in their stems and spraying sugarcane crop with gibberellins increases the length of the stem. |
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I: | They can be used to increase the length of grape stalks. |
II: | They can elongate and improve the shape of apple. |
III: | They speed up malting process in brewing industry. |
IV: | They hasten the maturity period of juvenile conifers. |
V: | They promote bolting in many plants with rosette habit. |
1. 2 | 2. 3 |
3. 4 | 4. 5 |
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1. Auxins 2. Cytokinins 3. Gibberellins 4. Ethylene |