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. | \(45^\circ C\) | Greater than
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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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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. |
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 |
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