All the following contribute to an increase in girth of dicots and gymnosperms except:
1. Apical meristem | 2. Lateral meristems |
3. Vascular cambium | 4. Cork-cambium |
Identify the incorrect statement regarding the arithmetic growth?
1. | Following mitosis, both daughter cells continue to divide |
2. | Can be exemplified by root elongating at a constant rate |
3. | On plotting the length of the organ against time, a linear curve is obtained |
4. | Mathematically it is expressed as |
The shape of the growth curve characteristic of a living organism growing in natural environment is:
1. | Linear | 2. | Sigmoid |
3. | Hyperbola | 4. | Bell shaped |
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
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. | \(45^\circ C\) | Greater than
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 |
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 |
Plasticity in plant growth means that
1. Plant roots are extensible
2. Plant growth is dependent on the environment
3. Stems can extend
4. None of the above