Q. No.
2. Deciduous angiosperms
3. Conifers
4. Cycads
2. bulliform cells
3. lenticels
4. complementary cells
Read the different components from I to IV in the list given below and tell the correct order of the components with reference to their arrangement from the outer side to the inner side in a woody dicot stem.
| I. | Secondary Cortex |
| II. | Wood |
| III. | Secondary phloem |
| IV. | Phellem |
The correct order is:
| 1. | III, IV, II, I | 2. | I, II, IV, III |
| 3. | IV, I, III, II | 4. | IV, III, I, II |
Vascular bundles in monocotyledons are considered closed because:
| 1. | a bundle sheath surrounds each bundle |
| 2. | cambium is absent |
| 3. | there are no vessels with perforations |
| 4. | xylem is surrounded all around by phloem |
Age of a tree can be estimated by:
1. biomass
2. number of annual rings
3. diameter of its heartwood
4. its height and girth
Lenticels are involved in:
1. Gaseous exchange
2. Food transfer
3. Photosynthesis
4. Transpiration
Interfascicular cambium develops from the cells of:
1. Xylem parenchyma
2. Endodermis
3. Pericycle
4. Medullary rays
Companion cells are closely associated with:
1. Sieve elements
2. Vessel elements
3. Trichomes
4. Guard cells
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