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 outer side to 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:  Dicot Stem |
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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:  Vascular Tissue System |
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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:  Anatomy of Root |
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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 your use to distinguish between the two?

1. Secondary xylem

2. Secondary phloem

3. Protoxylem

4. Cortical cells

Subtopic:  Dicot Stem |
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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:  Complex Tissue: Xylem |
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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

Subtopic:  Types of Wood |
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Lenticels are involved in:
1. Gaseous exchange
2. Food transfer
3. Photosynthesis
4. Transpiration

Subtopic:  Activity of Cork Cambium |
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Interfascicular cambium develops from the cells of

1. Xylem parenchyma

2. Endodermis

3. Pericycle

4. Medullary rays

Subtopic:  Activity of Vascular Cambium |
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The common bottle cork is a product of

1. dermatogen

2. phellogen

3. xylem

4. vascular cambium

Subtopic:  Activity of Cork Cambium |
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Companion cells are closely associated with

1. Sieve elements

2. Vessel elements

3. Trichomes

4. guard cells

Subtopic:  Complex Tissue: Phloem |
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