- 1(current)
Q. No.Lenticels are involved in:
| 1. Gaseous exchange | 2. Food transfer |
| 3. Photosynthesis | 4. Transpiration |
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The cork cambium, cork and secondary cortex are collectively called
| 1. phellogen | 2. periderm |
| 3. phellem | 4. phelloderm |
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Vascular bundles in monocotyledons are considered closed because
| 1. | Cambium is absent |
| 2. | There are no vessels with perforations |
| 3. | Xylem is surrounded all around by phloem |
| 4. | A bundle sheath surrounds each bundle |
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Which of the following statements about cork cambium is incorrect?
| 1. | It forms a secondary cortex on its outside |
| 2. | It forms a part of periderm |
| 3. | It is responsible for the formation of lenticels |
| 4. | It is a couple of layers thick |
Match List-I with List-II.
| List -I | List -I I | ||
| (a) | Lenticels | (i) | Phellogen |
| (b) | Cork cambium | (ii) | Suberin deposition |
| (c) | Secondary cortex | (iii) | Exchange of gases |
| (d) | Cork | (iv) | Phelloderm |
Choose the correct answer from the options given below.
| (a) | (b) | (c) | (d) | |
| 1. | (ii) | (iii) | (iv) | (i) |
| 2. | (iv) | (ii) | (i) | (iii) |
| 3. | (iv) | (i) | (iii) | (ii) |
| 4. | (iii) | (i) | (iv) | (ii) |
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Which of the following is made up of dead cells?
1. Xylem parenchyma
2. Collenchyma
3. Phellem
4. Phloem
- 1(current)
Q. No.
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