Question

Cork of commerce obtained from Quercus is part of

• A. Phellem
• B. Phellogen
• C. Phelloderm
• D. All of the above

Answer 1

The correct option is A Phellem

Cork of commerce obtained from Quercus is part of Phellem. Phellogen is defined as the meristematic cell layer responsible for the development of the periderm. Cells that grow inwards from the phellogen are termed phelloderm, and cells that develop outwards are termed phellem or cork. Growth and development of cork cambium is very variable between different species and is also highly dependent on age, growth conditions, etc. as can be observed from the different surfaces of bark.
Therefore, the correct option is A.