Interfascicular cambium is
(a) Intercalary meristem
(b) Secondary meristem
(c) Apical meristem
(d) Noncalary meristem

Options

A. Intercalary meristem
B. Secondary meristem
C. Apical meristem
D. Noncalary meristem

Answer

To determine the correct classification of interfascicular cambium, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Definition of Interfascicular Cambium**:
- Interfascicular cambium is a type of cambial layer that forms between two vascular bundles in a plant. This is crucial for understanding its function and classification.

2. **Identify the Role of Interfascicular Cambium**:
- The interfascicular cambium is involved in secondary growth. It contributes to the formation of secondary xylem (wood) and secondary phloem (bark) as it divides. This growth increases the girth of the plant.

3. **Classify the Type of Meristem**:
- Meristems are classified into three main categories:
- **Apical Meristem**: Responsible for primary growth (lengthening).
- **Intercalary Meristem**: Found at the base of leaves or internodes, also involved in primary growth.
- **Secondary Meristem**: Involved in secondary growth (thickening).
- Since interfascicular cambium is involved in secondary growth, it fits the definition of a secondary meristem.

4. **Evaluate the Options**:
- (a) Intercalary meristem - Incorrect, as it is involved in primary growth.
- (b) Secondary meristem - Correct, as it is involved in secondary growth.
- (c) Apical meristem - Incorrect, as it is also involved in primary growth.
- (d) Noncalary meristem - Incorrect, as this term does not apply to any known type of meristem.

5. **Conclusion**:
- Based on the definitions and functions discussed, the correct answer is (b) Secondary meristem.

### Final Answer:
(b) Secondary meristem