Lenticels are developed by the activity of

  1. Vascular Cambium
  2. Phellogen
  3. Dermatogen
  4. Intercalary Meristem

Answer b)

Explanation: Lenticels are small pores that are found on the epidermis of stems, fruits, and petioles. They always remain open, and allow exchange of gases and water vapour.

As a secondary growth, a periderm layer is formed on the barks of trees, which is composed of three layers – phellem, phellogen and phelloderm. The phellogen layer often divides rapidly, leaving spaces between them which form the lenticels. The nearby cells are called companion cells.

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