Secondary cortex is also known as

Options

A. phellogen
B. phellem
C. phelloderm
D. bark.

Answer

**Step-by-Step Solution:**

1. **Understanding Secondary Cortex**: The secondary cortex is a term used in botany to refer to a specific layer of tissue in plants, particularly in dicotyledons (dicots).

2. **Identifying the Meristems**: In dicot plants, there are two types of lateral meristems: cork cambium and vascular cambium. These are responsible for secondary growth.

3. **Role of Cork Cambium**: The cork cambium (also known as phellogen) is responsible for producing protective tissues. It divides to form the outer protective layer of the plant.

4. **Formation of Secondary Cortex**: The cork cambium produces pheloderm (the inner layer) and phelum (the outer layer). The pheloderm is specifically referred to as the secondary cortex.

5. **Conclusion**: Therefore, the secondary cortex is also known as pheloderm.

6. **Final Answer**: The answer to the question "Secondary cortex is also known as" is **pheloderm**.

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