Multiple choice

Periderm includes:

  1. phellum, phelloderm, plerome

  2. phellum, phellogen, dermatogen

  3. phellum, phellogen, phelloderm

  4. phellum, phellogen, cortex

  5. none of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Periderm is the protective outer tissue that replaces epidermis in secondary growth. It consists of three parts: phellum (cork) - dead cells at the surface, phellogen (cork cambium) - meristem that produces cells, and phelloderm - living parenchyma cells on the inner side. Plerome and dermatogen are histogen theory terms.

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