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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 |
Subtopic: Â Dicot Stem |
 57%
Level 3: 35%-60%
NEET - 2015
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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 |
Subtopic: Â Vascular Tissue System |
 90%
Level 1: 80%+
NEET - 2015
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A 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 |
Subtopic: Â Anatomy of Root |
 57%
Level 3: 35%-60%
NEET - 2015
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You 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 |
Subtopic: Â Anatomy of Root |Â Dicot Stem |
 68%
Level 2: 60%+
AIPMT - 2014
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Tracheids differ from the tracheary elements in:
| 1. | Having casparian strips |
| 2. | Being imperforate |
| 3. | Lacking nucleus |
| 4. | Being lignified |
Subtopic: Â Complex Tissue: Xylem |
Level 3: 35%-60%
AIPMT - 2014
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Lenticels are involved in:
| 1. | Gaseous exchange | 2. | Food transfer |
| 3. | Photosynthesis | 4. | Transpiration |
Subtopic: Â Activity of Cork Cambium |
 94%
Level 1: 80%+
AIPMT - 2013
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Which of the following statement is not true for stomatal apparatus?
| 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 |
Subtopic: Â Epidermal Tissue System |
 50%
Level 3: 35%-60%
NEET - 2013
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Subtopic: Â Activity of Cork Cambium |
 76%
Level 2: 60%+
AIPMT - 2012
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Companion cells are closely associated with:
| 1. | Sieve elements | 2. | Vessel elements |
| 3. | Trichomes | 4. | Guard cells |
Subtopic: Â Complex Tissue: Phloem |
 93%
Level 1: 80%+
AIPMT - 2012
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Subtopic: Â Vascular Tissue System |
 90%
Level 1: 80%+
AIPMT - 2012
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