| 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 |
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 |
Phloem fibres are
| 1. | also known as bast fibres |
| 2. | made up of sclerenchymatous cells |
| 3. | absent in primary phloem |
| 4. | All of these |
| 1. | collenchyma | 2. | vessel elements |
| 3. | lateral meristems | 4. | parenchyma |
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 |
| 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. |
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) |
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
| 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 |