Choose the incorrect sentence:

• A
  Phellogen,phellem,and phelloderm are collectively known as periderm.
• B
  Secondary growth occurs in the stems and roots of gymnosperms; however,secondary growth does not occur in monocotyledons.
• C
  Phellogen is made of narrow,thin-walled,and nearly rectangular cells.
• D
  Annual rings seen in a cut stem indicate the capacity for water absorption.