Adding of new cells always to the plant body by the activity of meristems is called as

Options

A. direct form of growth.
B. open form of growth
C. closed form of growth
D. indirect form of growth

Answer

To answer the question, "Adding of new cells always to the plant body by the activity of meristems is called as," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Meristems**:
- Meristems are specialized regions in plants where cell division occurs. They are responsible for the growth of the plant by adding new cells.

2. **Types of Growth**:
- In plants, growth can be classified into different forms. The two main types are:
- **Open form of growth**: This refers to continuous growth throughout the life of the plant, which is characteristic of meristematic tissues.
- **Closed form of growth**: This is a type of growth seen in certain animals where growth occurs only at specific stages.

3. **Evaluating the Options**:
- **Direct form of growth**: This is not applicable to plants as it relates more to animals.
- **Open form of growth**: This is the correct option as it describes the continuous addition of new cells by meristems.
- **Closed form of growth**: This is incorrect in the context of plants.
- **Indirect form of growth**: This does not apply to the growth of plants as it pertains to developmental stages in some animals.

4. **Conclusion**:
- The correct answer to the question is **open form of growth**, as it accurately describes the process by which meristems add new cells to the plant body.

### Final Answer:
The adding of new cells always to the plant body by the activity of meristems is called **open form of growth**.

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