Which of the following is a stress hormone in plants?
| 1. | ABA | 2. | GA3 |
| 3. | Cytokinin | 4. | Auxins |
What would be expected to happen if you cut the shoot tips of tea?
| 1. | Inhibition of lateral growth |
| 2. | Growth of lateral buds |
| 3. | Promotion of horizontal growth & male flowers |
| 4. | Inhibition of flowering |
| Assertion (A): | Ethylene helps the plants to increase their absorption surface. |
| Reason (R) : | It promotes root growth and root hair formation. |
| 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 statements |
Ethephon
| 1. | Thinning Cotton, Cherry and Walnut |
| 2. | Promotes female flowers in cucumber |
| 3. | Hastens the fruit ripening in tomatoes and apples |
| 4. | All of these |
The most widely used compound as source of Ethylene is
| 1. | Ethephon |
| 2. | Etiope |
| 3. | Ethyl Methyl carbon |
| 4. | Epitope |
Ethylene is not involved in which of the following physiological effect?
| 1. | Initiate flowering and for synchronising fruit-set in pineapples |
| 2. | Induces flowering in mango |
| 3. | The most widely used PGR in agriculture as regulates so many physiological processes |
| 4. | Help overcome the apical dominance |
Sprouting of potato, helping the leaves or upper parts of the rice shoot to remain above water, promotes root growth and root hair formation and helping plants to increase their absorption surface. Which of the following hormones is involved in such physiological effects?
| 1. | Ethylene | 2. | ABA |
| 3. | GA | 4. | Auxins |
The function which is not performed by Ethylene is
| 1. | Breaking of seed and bud dormancy |
| 2. | Initiates germination in peanut seeds |
| 3. | Improving the internode length of sugarcane |
| 4. | Promotes rapid internode and petiole elongation in deep water rice plants |
Respiratory climactic is due to
| 1. | Ethylene | 2. | ABA |
| 3. | GA | 4. | Auxins |
Ethylene does not perform
| 1. | Promotes senescence and abscission of plant organs especially of leaves and flowers |
| 2. | Highly effective in fruit ripening |
| 3. | Enhances the respiration rate during ripening of the fruits |
| 4. | Overcome the apical dominance |