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Q. No.Localized areas within the plant body where cell divisions occur are known as
1. organs
2. fibers
3. meristems
4. cork parenchyma
1. organs
2. fibers
3. meristems
4. cork parenchyma
Subtopic: Meristematic Tissues |
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Which of the following statements about sclereids is correct?
| 1. | Sclereids are living cells with thin walls and large vacuoles |
| 2. | Sclereids are a type of parenchyma involved in photosynthesis |
| 3. | Sclereids are dead cells with highly thickened, lignified walls that provide mechanical support |
| 4. | Sclereids are found only in the xylem vessels of roots |
Subtopic: Simple Tissue: Chollenchyma & Sclerenchyma |
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Which one is true for sclereids
| 1. | highly thickened dead walls with narrow lumen |
| 2. | present in fruit walls of nuts |
| 3. | pulp of guava, pear, and sapots |
| 4. | All of the above |
Subtopic: Simple Tissue: Chollenchyma & Sclerenchyma |
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Phloem fibres are
| 1. | also known as bast fibres |
| 2. | made up of sclerenchymatous cells |
| 3. | absent in primary phloem |
| 4. | All of these |
Subtopic: Complex Tissue: Phloem |
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Storage, secretion, and photosynthesis are the functions of
| 1. | collenchyma | 2. | vessel elements |
| 3. | lateral meristems | 4. | parenchyma |
Subtopic: Simple Tissue: Parenchyma |
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Which one is true of collenchyma?
| 1. | forms the hypodermis of dicot stem |
| 2. | present below epidermis in layers or patches |
| 3. | thickened corners due to cellulose, hemicellulose, and pectin deposition |
| 4. | All of the above |
Subtopic: Simple Tissue: Chollenchyma & Sclerenchyma |
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Identify the incorrect statement regarding sclerenchyma:
| 1. | Sclerenchyma cells are thick-walled and lignified. |
| 2. | They are always living at maturity. |
| 3. | They provide mechanical support. |
| 4. | They are present in vascular tissues. |
Subtopic: Simple Tissue: Chollenchyma & Sclerenchyma |
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Match List I with List II
| List - I | List - II | ||
| (a) | Cells with active cell division capacity | (i) | Vascular tissues |
| (b) | Tissue having all cells similar in structure and function | (ii) | Meristematic tissue |
| (c) | Tissue having different types of cells | (iii) | Sclereids |
| (d) | Dead cells with highly thickened walls and narrow lumen | (iv) | Simple tissue |
Select the correct answer from the options given below.
| (a) | (b) | (c) | (d) | |
| 1. | (i) | (ii) | (iii) | (iv) |
| 2. | (iii) | (ii) | (iv) | (i) |
| 3. | (ii) | (iv) | (i) | (iii) |
| 4. | (iv) | (iii) | (ii) | (i) |
Subtopic: Simple Tissue: Chollenchyma & Sclerenchyma |
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In which of the following tissue the cells are much thickened at the corners due to deposition of cellulose, hemicellulose, and pectin?
1. Parenchyma
2. Collenchyma
3. Sclerenchyma
4. Prosenchyma
Subtopic: Simple Tissue: Chollenchyma & Sclerenchyma |
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Why do sieve tubes require companion cells for their functioning?
| 1. | Companion cells provide structural support |
| 2. | Sieve tubes lack nucleus and depend on companion cells for metabolic activities |
| 3. | Companion cells help in water transport |
| 4. | Companion cells produce hormones |
Subtopic: Complex Tissue: Phloem |
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