Question

Which one is correct about the cork cambium
/ phellogen ?
(A) Usually cortex of stem forms it during
secondary growth of stem.
(B) It is a couple of layers thick
(C) It is made up of thin-walled rectangular cells
(D) All​

Answer 1

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.