Question

Periderm is produced by

(a) vascular cambium

(b) fascicular cambium

(c) phellogen

(d) intrafascicular cambium

Answer 1

Correct option (c) phellogen

Explanation

Phellogen or cork cambium which develops secondarily from some outer layer of cortex (or pericycle) divides on the outside as well as inside to form respectlely cork or phellem and secondary cortex or phelloderm. Cork, cork cambium and secondary cortex are together called periderm.