Removal of apical dominance by decapitation is utilised for:
1. Suppressing the activity of intercalary meristem
2. Early senescence
3. Hedge making
4. Preparing weed-free lawns
1. | Auxin | 2. | Cytokinin |
3. | Ethylene | 4. | Abscisic acid |
Who coined the term 'Kinetin'?
1. Skoog and Miller
2. Darwin
3. Went
4. Kurosawa
Match the following concerning the activity/function and the phytohormone involved:
Column I | Column II | ||
(a) | Fruit ripener | (i) | Abscisic acid |
(b) | Herbicide | (ii) | GA 3 |
(c) | Bolting agent | (iii) | 2, 4-D |
(d) | Stress hormone | (iv) | Ethephon |
Select the correct option from following:
Options: | (a) | (b) | (c) | (d) |
1. | (ii) | (iii) | (iv) | (i) |
2. | (iii) | (iv) | (ii) | (i) |
3. | (iv) | (iii) | (ii) | (i) |
4. | (iv) | (ii) | (i) | (iii) |
Removal of shoot tips is a very useful technique to boost the production of tea leaves. This is because:
1. | Gibberellins prevent bolting and are inactivated. |
2. | Auxins prevent leaf drop at early stages. |
3. | Effect of auxins is removed and the growth of lateral buds is enhanced. |
4. | Gibberellins delay the senescence of leaves. |
One of the commonly used plant growth hormone in tea plantations is:
1. | Abscisic acid | 2. | Zeatin |
3. | Indole-3- acetic acid | 4. | Ethylene |
Root development is promoted by:
1. Auxin
2. Gibberellin
3. Ethylene
4. Abscisic acid
One of the synthetic auxin is:
1. NAA
2. IAA
3. GA
4. IBA