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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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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Grass leaves curl inwards during very dry weather. Select the most appropriate reason from the following :

1. Tyloses in vessels

2. Closure of stomata 

3. Flaccidity of bulliform cells

4. Shrinkage of air spaces in spongy mesophyll

Subtopic:  Monocot Leaf |
 81%
From NCERT
NEET - 2019
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Phloem in gymnosperms lacks:

1. Both sieve tubes and companion cells 

2. Albuminous cells and sieve cells

3. Sieve tubes only

4. Companion cells only

Subtopic:  Complex Tissue: Phloem |
 81%
From NCERT
NEET - 2019
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Mechanical support to the growing parts of the plant such as young stem and petiole of leaf is provided by a living tissue called

1. Collenchyma 2. Aerenchyma
3. Chlorenchyma 4. Sclerenchyma
Subtopic:  Simple Tissue: Chollenchyma & Sclerenchyma |
 87%
From NCERT
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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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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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Specialised epidermal cells surrounding the guard cells are called?
1. subsidiary cells
2. bulliform cells
3. lenticels
4. complementary cells
Subtopic:  Epidermal Tissue System |
 92%
From NCERT
NEET - 2016
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Stomata in grass leaves are:
1. Dumb-bell shaped
2. Kidney shaped
3. Rectangular
4. Barrel-shaped
Subtopic:  Epidermal Tissue System |
 91%
From NCERT
NEET - 2018
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Cortex is the region found between?

1. epidermis and stele

2. pericycle and endodermis

3. endodermis and pith

4. endodermis and vascular bundle

Subtopic:  Anatomy of Root |
 73%
From NCERT
NEET - 2016
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