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
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 \(45^\circ C\) |
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 |
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 |
Formation of interfascicular cambium and cork cambium is possible most importantly because of:
| 1. | Differentiation | 2. | Dedifferentiation |
| 3. | Redifferentiation | 4. | Reverse differentiation |
The growth in plants can be best expressed as [refer Section 15.2]:
| 1. Open | 2. Determinate |
| 3. Closed | 4. Redundant |
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 |
Plants follow different pathways in response to environment or phases of life to form different kinds of structures. This ability is called:
| 1. Efficiency index | 2. Plasticity |
| 3. Norm of reaction | 4. Developmental noise |
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 |
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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