Q. No.Plant growth and further development is intimately linked to water status of the plant because:
A. Turgidity of cells helps in extension growth
B. It provides medium for enzymatic activity
1. Both A and B are correct
2. Only A is correct
3. Only B is correct
4. Both A and B are incorrect
A. Turgidity of cells helps in extension growth
B. It provides medium for enzymatic activity
1. Both A and B are correct
2. Only A is correct
3. Only B is correct
4. Both A and B are incorrect
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The optimum temperature range for proper growth in most plants is:
| 1. \(0^\circ C - 100^\circ C\) | 2. \(15^\circ C - 20^\circ C\) |
| 3. \(28^\circ C - 30^\circ C\) | 4. Greater than \(45^\circ C\) |
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Consider the given diagram and select the correct inference:
1. Both leaves have shown different absolute growths
2. First leaf has exhibited growth but second leaf has not as it is already senescent
3. The relative growth of first leaf is more than that of the second leaf
4. Both leaves have exhibited equal relative growths
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To differentiate into a tracheary element, a cell would:
1. Gain protoplasm
2. Become multinucleate
3. Assimilate lot of collagen and elastin
4. Develop lignocellulosic secondary cell wall
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Formation of interfascicular cambium and cork cambium is possible most importantly because of:
| 1. Differentiation | 2. Dedifferentiation |
| 3. Redifferentiation | 4. Reverse differentiation |
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The growth in plants can be best expressed as [refer Section 15.2]:
| 1. Open | 2. Determinate |
| 3. Closed | 4. Redundant |
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Development is a term that includes all changes that a plant goes through during its life cycle:
1. till germination of the seed
2. during its vegetative growth
3. from germination till flowering
4. from germination to senescence
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Difference in shapes of leaves produced in air and those produced in water represents heterophyllous development due to environment in:
| 1. Cotton | 2. Coriander |
| 3. Larkspur | 4. Butter cup |
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Identify the incorrectly matched pair:
| PGR | Chemical nature | |
| 1. | Auxins | Indole compounds |
| 2. | Cytokinin | Pyrimidine derivatives |
| 3. | ABA | Carotenoid derivative |
| 4. | Gibberellic acid | Terpenes |
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Identify the plant growth regulator that, though is largely an inhibitor but, can be placed in both plant growth promoter and plant growth inhibitor groups?
| 1. Auxins | 2. Gibberellins |
| 3. Ethylene | 4. Abscisic acid |
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