Growth is maximum in zone of

Options

A. cell elongation
B. cell division
C. cell maturation
D. all of these

Answer

To answer the question "Growth is maximum in zone of", we need to analyze the different zones of growth in plants, particularly focusing on the three main phases of cell growth: cell division, cell elongation, and cell differentiation.

### Step-by-Step Solution:

1. **Understanding the Growth Phases**:
- Plant growth occurs in three major phases: cell division, cell elongation, and cell differentiation.
- Each of these phases contributes to the overall growth of the plant.

2. **Cell Division**:
- In the cell division phase, meristematic cells (undifferentiated cells) divide rapidly.
- This phase increases the number of cells but does not significantly increase the size of each cell.

3. **Cell Elongation**:
- After cells have divided, they enter the cell elongation phase.
- In this phase, newly formed cells increase in length and volume.
- This is where the cells grow larger, contributing significantly to the overall growth of the plant.

4. **Cell Differentiation**:
- The final phase is cell differentiation, where cells specialize and mature into different types of cells.
- While this phase is crucial for the development of plant structure, the maximum increase in size occurs before this phase.

5. **Conclusion**:
- The maximum growth in terms of size and volume occurs during the cell elongation phase.
- Therefore, the correct answer to the question is that growth is maximum in the zone of **cell elongation**.

### Final Answer:
Growth is maximum in the zone of **cell elongation**.

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