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

Vascular bundles in monocotyledons are considered closed because:

A major characteristic of the monocot root is the presence of:

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

Tracheids differ from the tracheary elements in:

1. Having casparian strips

2. Being imperforate

3. Lacking nucleus

4. Being lignified

Lenticels are involved in:
1. Gaseous exchange
2. Food transfer
3. Photosynthesis
4. Transpiration

The common bottle cork is a product of:

1. dermatogen

2. phellogen

3. xylem

4. vascular cambium

Companion cells are closely associated with:

1. Sieve elements

2. Vessel elements

3. Trichomes

4. guard cells

Closed vascular bundles lack:

1. Ground tissue

2. Conjuctive tissue

3. Cambium

4. Pith