One of the synthetic auxin is
1. | NAA | 2. | IAA |
3. | GA | 4. | IBA |
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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 |
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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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