Continuous growth of plants throughout their life is due to

Options

A. Mitotic division in the apical meristem and the lateral cambium
B. Mitotic division in primary permanent tissues
C. Production of seeds
D. Photosynthetically active cells only

Answer

To answer the question regarding the continuous growth of plants throughout their life, we can break down the explanation into clear steps:

### Step-by-Step Solution:

1. **Understanding Plant Growth**:
- Plants exhibit continuous growth throughout their life due to specific regions in their structure that allow for this growth.

2. **Role of Mitosis**:
- The primary mechanism behind plant growth is mitosis, which is the process of cell division that leads to the formation of new cells. This is crucial for growth as it increases the number of cells in the plant.

3. **Meristematic Tissues**:
- The growth is primarily facilitated by meristematic tissues, which are regions of undifferentiated cells that can divide and differentiate into various types of cells. There are two main types of meristems:
- **Apical Meristem**: Located at the tips of roots and shoots, responsible for the elongation of the plant (primary growth).
- **Lateral Meristem**: Responsible for the increase in girth or thickness of the plant (secondary growth).

4. **Continuous Growth**:
- Because meristematic tissues remain active throughout the life of the plant, they allow for continuous growth. This means that as long as these tissues are present and functional, the plant can keep growing.

5. **Conclusion**:
- Therefore, the continuous growth of plants throughout their life is due to the presence of meristematic tissues that undergo mitotic division, allowing for the formation of new cells and tissues.

### Final Answer:
The continuous growth of plants throughout their life is due to the presence of meristematic tissues that undergo mitotic division.

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