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Q. No.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 |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyVascular 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 |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA major characteristic of the monocot root is the presence of:
| 1. | Scattered vascular bundles |
| 2. | Vasculature without cambium |
| 3. | Cambium sandwiched between phloem and xylem along the radius |
| 4. | Open vascular bundles |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyYou are given a fairly old piece of dicot stem and a dicot root. Which of the following anatomical structures will you use to distinguish between the two?
1. Secondary xylem
2. Secondary phloem
3. Protoxylem
4. Cortical cells
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyTracheids differ from the tracheary elements in:
1. Having casparian strips
2. Being imperforate
3. Lacking nucleus
4. Being lignified
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyLenticels are involved in:
1. Gaseous exchange
2. Food transfer
3. Photosynthesis
4. Transpiration
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology| 1. | Guard cells invariably possess chloroplasts and mitochondria |
| 2. | Guard cells are always surrounded by subsidiary cells |
| 3. | Stomata are involved in gaseous exchange |
| 4. | Inner walls of guard cells are thick |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe common bottle cork is a product of:
1. dermatogen
2. phellogen
3. xylem
4. vascular cambium
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyCompanion cells are closely associated with:
1. Sieve elements
2. Vessel elements
3. Trichomes
4. Guard cells
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyClosed vascular bundles lack:
1. Ground tissue
2. Conjuctive tissue
3. Cambium
4. Pith
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologySelect Chapter Topics:
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