Q. No.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: Â Simple Tissue: Chollenchyma & Sclerenchyma |
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Level 1: 80%+
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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: Â Simple Tissue: Chollenchyma & Sclerenchyma |
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Level 1: 80%+
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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: Â Simple Tissue: Chollenchyma & Sclerenchyma |
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Level 1: 80%+
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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: Â Simple Tissue: Chollenchyma & Sclerenchyma |
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Level 2: 60%+
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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: Â Simple Tissue: Chollenchyma & Sclerenchyma |
 94%
Level 1: 80%+
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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: Â Simple Tissue: Chollenchyma & Sclerenchyma |
 91%
Level 1: 80%+
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In dicot stems, why are collenchyma tissues generally found beneath the epidermis?
| 1. | To provide flexibility and mechanical support to the stem. |
| 2. | To facilitate gaseous exchange through the stem. |
| 3. | To conduct water and nutrients from the roots. |
| 4. | To store food and nutrients for the stem. |
Subtopic: Â Simple Tissue: Chollenchyma & Sclerenchyma |
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Level 1: 80%+
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Subtopic: Â Simple Tissue: Chollenchyma & Sclerenchyma |
 89%
Level 1: 80%+
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Match the plants with the parts where sclereids are commonly found in them:
|
Plants |
Parts |
||
| A. |
Nuts |
a. |
Fruit walls |
| B. |
Sapota |
b. |
Pulp of fruit |
| C. |
Legumes |
c. |
Seed coat |
| D. |
Tea |
d. |
Leaves |
Codes
| A | B | C | D | |
| 1. | a | b | c | d |
| 2. | b | a | d | c |
| 3. | b | d | c | a |
| 4. | d | c | b | a |
Subtopic: Â Simple Tissue: Chollenchyma & Sclerenchyma |
 91%
Level 1: 80%+
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In which tissue and under what conditions is sclerenchyma primarily found, and what function does it perform?
| 1. | Found in young stems and roots, providing flexibility and photosynthesis. |
| 2. | Located near the epidermis, aiding in the regulation of transpiration and gaseous exchange. |
| 3. | Present in seed coats, nut shells, and vascular bundles; composed of dead cells with thick lignified walls that provide mechanical support. |
| 4. | Found in leaf mesophyll, enabling photosynthesis through chloroplasts. |
Subtopic: Â Simple Tissue: Chollenchyma & Sclerenchyma |
 92%
Level 1: 80%+
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