In the dicot stem, cork cambium is first derived from

• A. Cortex
• B. Phellogen
• C. Phelloderm
• D. Pericycle

The cork cambium, also known as phellogen, is a crucial layer in the structure of a dicot stem. It is primarily responsible for producing cork cells that protect the plant. The correct answer to your question is:

Answer

B. Phellogen

Explanation

The cork cambium originates from the phellogen, which is a type of lateral meristem. This layer develops from the outer cortex of the stem and contributes to the formation of the protective outer layer of the plant.

Additional Information

• The cork cambium is essential for secondary growth in dicots.
• It helps in the formation of bark, which includes cork and phelloderm.
• Understanding the role of cork cambium is important for studying plant anatomy and growth.