The common bottle cork is a product of
1. Dermatogen
2. Phellogen
3. Xylem
4. Vascular Cambium

As compared to a dicot root, a monocot root has
1. More abundant secondary xylem
2. Many xylem bundles
3. Inconspicuous annual rings
4. Relatively thicker periderm

Age of a tree can be estimated by:
1. biomass
2. number of annual rings
3. diameter of its heartwood
4. its height and girth

Interfascicular cambium develops from the cells 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?

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