Q. No.How does pruning help in making the hedge dense?
1. It induces the differentiation of new shoots from the rootstock
2. It frees axillary buds from apical dominance
3. The apical shoots grow faster after pruning
4. It releases wound hormones
1. It induces the differentiation of new shoots from the rootstock
2. It frees axillary buds from apical dominance
3. The apical shoots grow faster after pruning
4. It releases wound hormones
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Which of the following is not a function of auxins in plants?
1. Promotion of flowering in pineapples
2. Induction of parthenocarpy in tomatoes.
3. Apical dominance
4. Promotion of female flowers in cucumber
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Identify the plant growth regulator that is not correctly matched to its chemical nature in the following given options:
|
|
PGR |
Chemical nature |
|
1. |
Ethylene |
Gaseous |
|
2. |
Adenine derivatives |
Kinetin |
|
3. |
Indole compounds |
Auxins |
|
4. |
Terpenes |
Abscisic acid |
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If we plot the parameter of growth against time for a living organism growing in a natural environment, the shaped of the curve is expected to be:
| 1. | Linear | 2. | Rectangular hyperbola |
| 3. | Sigmoid | 4. | Bell shaped |
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Parthenocarpy in tomato plants can be induced by:
| 1. | Auxins | 2. | Gibberellins |
| 3. | ABA | 4. | Cytokinins |
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PGR causing the closure of stomata in response to water stress is:
| 1. | ABA | 2. | Gibberellins |
| 3. | Auxin | 4. | Cytokinin |
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When compared to their normal sized counterparts, the dwarf mutant varieties of a plant generally produce less:
| 1. | Auxins | 2. | Gibberellins |
| 3. | Ethylene | 4. | ABA |
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Plant growth is generally indeterminate because of:
1. Phenotypic plasticity
2. Geometrical growth shown by all organs
3. Presence of meristems
4. Terminally differentiated cells
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Match each item in Column I with one in Column II and select the correct answer from the codes given:
|
|
PGR |
|
Chemical nature |
|
A |
Indole compounds |
P |
Gibberellins |
|
B |
Adenine derivatives |
Q |
ABA |
|
C |
Terpenes |
R |
Auxins |
|
D |
Derivatives of carotenoids |
S |
Cytokinins |
Codes
|
|
A |
B |
C |
D |
|
1. |
R |
S |
P |
Q |
|
2. |
R |
S |
Q |
P |
|
3. |
S |
R |
P |
Q |
|
4. |
S |
R |
Q |
P |
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