Describe the formation of phelloderm.

Which of the following are the part of the Periderm?

I. Duramen

II. Phellogen

III. Phellem

IV. Phelloderm

V. Alburnum

The correct answer is

Assertion $\left(\mathrm{A}\right):$ The peripheral region of the secondary xylem is lighter in colour and is known as the sapwood (alburnum).

Reason $\left(\mathrm{R}\right):$ It is involved in the conduction of water and minerals from root to leaf.

The correct answer is:

Identify the correct statements:

A. Lenticels are the lens-shaped openings permitting the exchange of gases.

B. Bark formed early in the season is called hard bark.

C. Bark is a technical term that refers to all tissues exterior to vascular cambium.

D. Bark refers to periderm and secondary phloem.

E. Phellogen is single-layered in thickness.

Choose the correct answer from the options given below:

Label the parts $1, 2, 3, 4$ of the Lenticel structure shown in the figure ?