Multiple choice

The walls of cork cells are heavily thickened with an organic substance called

  1. epidermis

  2. suberin

  3. phelloderm

  4. cutin

  5. pectin

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is the correct option. The walls of cork cells are heavily thickened with an organic substance called suberin. Suberin makes these cells impermeable to water and gases.