Tracheids differ from the tracheary elements in
1. Having casparian strips
2. Being imperforate
3. Lacking nucleus
4. Being lignified

A major characteristic of the monocot root is the presence of

Vascular bundles in monocotyledons are considered closed because
1. Cambium is absent
2. There are no vessels with perforations
3. Xylem is surrounded all around by phloem
4. A bundle sheath surrounds each bundle

Read the different components from (a) to (d) in the list given below and tell the correct order of the components with reference to their arrangement from outer side to inner side in a woody dicot stem 
(a) Secondary cortex
(b) Wood
(c) Secondary phloem
(d) Phellem

The correct order is:

Specialised epidermal cells surrounding the guard cells are called:
1. Lenticels
2. Complementary cells
3. Subsidiary cells
4. Bulliform cells

Cortex is the region found between
1. endodermis and vascular bundle
2. epidermis and stele
3. pericycle and endodermis
4. endodermis and pith

The balloon-shaped structures called tyloses
1. are linked to the ascent of sap through xylem vessels
2. originate in the lumen of vessels
3. characterize the sapwood
4. are extensions of xylem parenchyma cells into vessels

Identify the wrong statement in context of heartwood:
1. Organic compounds are deposited in it
2. It is highly durable
3. It conducts water and minerals efficiently
4. It comprises dead elements with highly lignified walls

Which of the following is made up of dead cells?
1. Xylem parenchyma
2. Collenchyma
3. Phellem
4. Phloem

The vascular cambium normally gives rise to