Question

Which of the following is not a part of epidermal tissue system?

• A. Companion cells
• B. Trichomes
• C. Root hairs
• D. Guard cells
• E. Subsidiary cells

Answer 1

The correct option is A Companion cells

• The epidermis is only one layer of cells that covers the leaves, flowers, roots, and stems of plants. It makes a boundary between the plant and the external environment. It comprises epidermal cells, stomata, and epidermal appendages (trichomes and root hairs).
  
• It does not contain companion cells. Companion cell is a part of phloem.

So, the correct answer is 'Companion cells.