Q. No.Through their effect on plant growth regulators, what do the temperature and light control in the plants?
1. Flowering
2. Closure of stomata
3. Fruit elongation
4. Apical dominance
Which one of the following generally acts as an antagonist to Gibberellins?
1. Ethylene
2. ABA
3. IAA
4. Zeatin
One of the commonly used plant growth hormone in tea plantations is:
| 1. | Abscisic acid | 2. | Zeatin |
| 3. | Indole-3- acetic acid | 4. | Ethylene |
1. NAA, 2, 4-D
2. GA3
3. Cytokinin
4. IAA, IBA
An enzyme that can stimulate the germination of barley seeds is:
1. -amylase
2. lipase
3. protease
4. invertase
Treatment of seed at low temperature under moist conditions to break its dormancy is called:
1. sacrification
2. vernalization
3. chelation
4. stratification
How does pruning help in making the hedge dense?
| 1. | It includes the differentiation of new shoots from the rootstock |
| 2. | It frees axillary buds from apical dominance |
| 3. | The apical shoot grows faster after pruning |
| 4. | It releases wound hormones |
Parthenocarpic tomato fruits can be produced by:
| 1. | removing androecium of flowers before pollen grains are released |
| 2. | treating the plants with low concentrations of gibberellic acid and auxins |
| 3. | raising the plants from vernalised seeds |
| 4. | treating the plants with phenylmercuric acetate |
© 2026 GoodEd Technologies Pvt. Ltd.