Both apical meristem and intercalary meristems are primary meristems because

Options

A. They are responsible for producing secondary tissues.
B. They are responsible for producing secondary meristems.
C. They appear early in life of a plant and contribute to the formation of the primary plant body.
D. They are cylindrical

Answer

To answer the question of why both apical meristems and intercalary meristems are classified as primary meristems, we can break down the reasoning into a series of steps:

### Step-by-Step Solution:

1. **Definition of Meristems**: Understand that meristems are regions in plants where cells are actively dividing. They are responsible for growth.

2. **Types of Meristems**: Identify the two types of meristems mentioned:
- **Apical Meristems**: Located at the tips of roots and shoots, responsible for the elongation of these parts.
- **Intercalary Meristems**: Found between permanent tissues, often at the nodes of stems and bases of leaves, contributing to growth in length.

3. **Primary vs. Secondary Meristems**: Differentiate between primary and secondary meristems:
- **Primary Meristems**: These are responsible for the initial growth of the plant, leading to the formation of the primary plant body.
- **Secondary Meristems**: These contribute to the growth in thickness (secondary growth) and are not involved in the initial formation of the plant structure.

4. **Role in Plant Development**: Recognize that both apical and intercalary meristems are involved in the early stages of plant development. They contribute to the primary plant body, which includes the primary tissues formed during the initial growth phase.

5. **Conclusion**: Conclude that both apical and intercalary meristems are classified as primary meristems because they appear early in the life of the plant and contribute to the formation of the primary plant body.

### Final Answer:
Both apical meristems and intercalary meristems are primary meristems because they appear early in the life of the plant and contribute to the formation of the primary plant body.

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