Question

Which of the following statements is or are not true?
1. Cork cambium is otherwise called as phellogen.
2. Cork is otherwise called as phellem.
3. Secondary cortex is otherwise called as periderm.
4. Cork cambium, cork and secondary-cortex are collectively called as phelloderm.

• A. 3 and 4 only
• B. 1 and 2 only
• C. 2 and 3 only
• D. 2 and 4 only

Answer 1

Answer: (A)

3 and 4 only

During secondary growth in dicot roots, phellogen or cork cambium produce periderm. The cork cambium produces cork or phellem towards the periphery. Secondary cortex (secondary phloem) is produced by the cambium and while periderm is developed by phellogen. Thus, the cork cambium produces phelloderm on inside and phellem or cork on outside.
Thus, the correct answer is option A.