Secondary xylem and phloem in dicot stem are produced by?

1. Apical meristems 2. Vascular cambium
3. Phellogen 4. Axillary meristems

Subtopic:  Dicot Stem |
 85%
From NCERT
NEET - 2018
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Casparian strips occur in?
1. Epidermis
2. Pericycle
3. Cortex
4. Endodermis
Subtopic:  Anatomy of Root |
 78%
From NCERT
NEET - 2018
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Plants having little or no secondary growth are:
1. Grasses
2. Deciduous angiosperms
3. Conifers
4. Cycads
Subtopic:  Secondary Growth in Root (OLD NCERT) |
 85%
From NCERT
NEET - 2018
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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 |
 58%
From NCERT
NEET - 2015
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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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Gymnosperms are also called softwood spermatophytes because they lack:

1. Cambium

2. Phloem fibres

3. Thick-walled tracheids

4. Xylem fibres

Subtopic:  Complex Tissue: Xylem |
AIPMT - 2012
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Ground tissue includes:

1.  all tissues except epidermis and vascular bundles

2.  epidermis and cortex

3.  all tissues internal to endodermis

4.  all tissues external to endodermis

Subtopic:  Ground Tissue System |
 90%
AIPMT - 2011
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The cork cambium, cork and secondary cortex are collectively called:
1.  phellogen
2.  periderm
3.  phellem
4.  phelloderm
Subtopic:  Activity of Cork Cambium |
 83%
From NCERT
AIPMT - 2011
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The annular and spirally thickened conducting elements generally develop in the protoxylem when the root or stem is:

1. maturing

2. elongating

3. widening

4. differentiating

Subtopic:  Anatomy of Root |
AIPMT - 2009
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The length of different internodes in a culm of sugarcane is variable because of:

1. shoot apical meristem

2. position of axillary buds

3. size of leaf lamina at the node below each internode

4. intercalary meristem

Subtopic:  Meristematic Tissue:Classification (OLD NCERT) |
 65%
AIPMT - 2008
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