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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What is true about cork cambium?
1. It is extrastelar cambium in dicot stem.
2. In dicot stem it arises from the cells of cortex region.
3. It is also known as phellogen.
4. All the above

Subtopic:  Activity of Cork Cambium |
 90%
From NCERT
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Match the Column I and II.

Column I

Column II

A.  Bulliform cells

1.   Stomata

B.  Guard cells

2.   Aerating pore

C.  Lenticels

3.   Accessory cells

D.  Subsidiary cell

4.   Isobilateral cells


        A  B  C  D
(a)   1   2  3   4
(b)   3   1  2   4
(c)   4   1  2   3
(d)   4   3  2   1

Subtopic:  Epidermal Tissue System | Monocot Leaf | Activity of Cork Cambium |
 81%
From NCERT
AIIMS - 2014
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Identify the wrong statement in the context of cork cambium

1. Cork cambium is also called phellogen

2. Cork cambium is usually developed from the secondary xylem

3. Outer cells of phellogen differentiate into cork

4. Inner part of phellogen leads to the formation of phelloderm

Subtopic:  Activity of Cork Cambium |
 78%
From NCERT
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Lenticels are present in

1. Outer primary protective tissue

2. The outer layer of secondary protective tissue

3. The middle layer of secondary protective tissue

4. Inner layer of secondary protective tissue

Subtopic:  Activity of Cork Cambium |
 76%
From NCERT
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Column I  Column II
A. Spring wood or early wood
B. Autumn wood or late wood
I. Lighter in colour
II. Density high
III. Density low
IV. Darker in colour           
V. Larger number of xylary elements
VI. Vessels with wider cavity
VII. Lesser number of xylary elements
VIII. Vessels with small cavity

        
Which of the following matching is correct?

1. A – II, IV, VII, VIII; B – I, III, V, VI
2. A – I, II, VIII, VIII; B – III, IV, V, VI
3. A – I, III, V, VI; B – II, IV, VII, VIII
4. A – I, III, VII, VIII; B – II, IV, V, VI

Subtopic:  Activity of Cork Cambium |
 79%
From NCERT
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The term 'bark' includes: 

I.      Phellogen

II.     Phellem

III.    Phelloderm

IV.     Secondary phloem

1.       I, II and III only

2.       I, II and IV only

3.       II, III and IV only

4.       I, II, III and IV only

Subtopic:  Activity of Cork Cambium |
 71%
From NCERT
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A tree can be killed by removing its bark, as this also removes the ________.

1. Phelloderm only

2. Phellem only

3. Primary xylem

4. Secondary phloem

Subtopic:  Activity of Cork Cambium |
 77%
From NCERT
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Bark refers to all the tissues

1. External to vascular cambium

2. External to cork cambium

3. Formed earlier in the season

4. Impregnated with suberin

Subtopic:  Activity of Cork Cambium |
 78%
From NCERT
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The tissue belonging to bark but not to periderm is

1. Vascular cambium

2. Secondary phloem

3. Phellem

4. Secondary cortex

Subtopic:  Activity of Cork Cambium |
 73%
From NCERT
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