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:  Dicot Stem |
 59%
From NCERT
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:  Vascular Tissue System |
 89%
From NCERT
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:  Anatomy of Root |
 55%
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:  Dicot Stem |
 68%
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:  Complex Tissue: Xylem |
AIPMT - 2014
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Lenticels are involved in:
1. Gaseous exchange
2. Food transfer
3. Photosynthesis
4. Transpiration

Subtopic:  Activity of Cork Cambium |
 94%
From NCERT
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:  Epidermal Tissue System |
From NCERT
NEET - 2013
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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 |
 77%
AIPMT - 2012
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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 |
 93%
From NCERT
AIPMT - 2012
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Closed vascular bundles lack:

1. Ground tissue

2. Conjuctive tissue

3. Cambium

4. Pith

Subtopic:  Vascular Tissue System |
 89%
From NCERT
AIPMT - 2012
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