Give on basic functional difference between phellogen and phelloderm.

Explanation

To answer the question regarding the basic functional difference between phellogen and phelloderm, we can break it down step by step:

### Step 1: Define Phellogen
Phellogen, also known as cork cambium, is a type of meristematic tissue. This means that it consists of actively dividing cells.

### Step 2: Define Phelloderm
Phelloderm is a type of permanent tissue that is formed from the cells produced by the phellogen. Unlike phellogen, the cells in phelloderm have lost their ability to divide.

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