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

Match the Column I and II.

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

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

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

        
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

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

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

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

The tissue belonging to bark but not to periderm is

1. Vascular cambium

2. Secondary phloem

3. Phellem

4. Secondary cortex