Question
Biology Question on Anatomy of Flowering Plants
The cork cambium, cork and secondary cortex are collectively called :
A
Phelloderm
B
periderm
C
Phellogen
D
Phellem
Answer
periderm
Explanation
Solution
The cell of the cork cambium divide to produce an outer corky tissue (cork or phellem) and an inner secondary cortex (phelloderm). Cork, cork cambium, and phelloderm together make up the periderm, an impermeable outer layer that protects the inner stem tissues if the outer tissues split as the stem girth increases with age.