- 1(current)
Q. No.Match Column I [phase of growth] and Column II [cell characteristics] and choose the correct answer from the codes given:
| COLUMN I | COLUMN II | ||
| A | Meristematic | a | Increased vacuolation, new cell wall deposition |
| B | Elongation | b | Thin cellulosic wall with abundant plasmodesmatal connections |
| C | Maturation | c | Maximal wall thickening |
Codes
| A | B | C | |
| 1. | a | b | c |
| 2. | b | c | a |
| 3. | b | a | c |
| 4. | c | b | a |
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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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I: The region shown as A to G is the zone of elongation.
II. The portion of the axis which is undergoing the phase of maturation lies more distal to the phase of elongation.
| 1. Only I | 2. Only II |
| 3. Both I and II | 4. Neither I nor II |
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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 |
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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
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I: is characteristic of living organism growing in a natural environment.
II: is typical for all cells, tissues and organs of a plant.
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
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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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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Plants follow different pathways in response to environment or phases of life to form different kinds of structures. This ability is called:
| 1. Plasticity | 2. Norm of the reaction |
| 3. Development noise | 4. Acclimatisation |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
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- 1(current)
Q. No.
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