Q. No.Which of the following component of phloem is mainly responsible for the storage of food material and other substances like resins, latex and mucilage?
1. Sieve tube
2. Companion cell
3. Bast fibres
4. Phloem parenchyma
Living mechanical tissue with a thickening at the cells corners possess deposition of
| 1. | Lignin |
| 2. | Cellulose and pectin only |
| 3. | Cellulose, hemicellulose and pectin |
| 4. | Cellulose only |
Identify the mismatched pair:
| Tissue | Feature | |
| 1. |  |
Thick walled, elongated and pointed cells present in hypodermis of dicot stem |
| 2. |  |
Forms the major component within plant organs |
| 3. |  |
Commonly found in pulp of fruits like guava, pear and sapota |
| 4. |  |
Provide mechanical support to growing parts of plant |
Mark the incorrect statement with respect to guard cells in stomata
| 1. | In grasses these are dumb-bell shaped |
| 2. | They possess chloroplasts |
| 3. | Regulate opening and closing of stomata |
| 4. | Outer walls are thick and inner walls are thin in dicots |
Well developed pith is present in
1. Dicot stem, monocot root
2. Monocot stem, dicot root
3. Dicot root, dicot stem
4. Monocot root, monocot stem
Which among the following cannot be a feature of given diagram?
| 1. | It is a long cylindrical tube like structure |
| 2. | Having lignified walls |
| 3. | having large central cavity |
| 4. | Having protoplasm |
Match the column I with column II
| Column I | Column II | ||
| a. | Xylem parenchyma | (i) | Absent in most of the monocots |
| b. | Sclereids | (ii) | Lond cylindrical tube-like structure |
| c. | Phloem parenchyma | (iii) | Food and tannins |
| d. | Vessel | (iv) | Fruit walls of nuts |
1. a(i), b(ii), c(iii), d(iv)
2. a(ii), b(iv), c(iii), d(i)
3. a(iii), b(iv), c(i), d(ii)
4. a(iii), b(ii), c(i), d(iv)
Sieve tube elements are long, tube-like structures, arranged longitudinally and associated with the companion cells. A mature sieve element
| 1. | Has a small vacuole |
| 2. | Lacks nucleus and cytoplasm |
| 3. | Possesses a large vacuole and small nucleus |
| 4. | Possesses a peripheral cytoplasm |
Select the incorrect statement with respect to bast fibres
| a. | Generally absent in primary phloem |
| b. | Elongated, branched with blunt ends |
| c. | Parenchymatous in nature |
| d. | Becomes dead at maturity |
1. a & d
2. b & d
3. b & c
4. a & b
Epidermal hairs on stems known as trichomes
| 1. | May sometimes be secretory in function |
| 2. | Have vascular supply |
| 3. | May be soft or stiff but unbranched always |
| 4. | Are endogenous in origin like lateral roots |
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