Cells fo which phase attain maximum size of terms of wall thickning growth per unit time is termed as

Answer

To answer the question regarding which phase of plant cells attains maximum size in terms of wall thickening growth per unit time, we can break down the solution into clear steps:

### Step-by-Step Solution:

1. **Identify the Growth Phases**:
- Plant growth occurs in three distinct phases:
- Meristematic Phase
- Elongation Phase
- Maturation Phase

2. **Understand the Meristematic Phase**:
- In this phase, cells are actively dividing.
- The walls of these cells are thin and contain very little cellulose.
- This phase is primarily focused on cell division rather than growth in size.

3. **Examine the Elongation Phase**:
- During this phase, cells begin to enlarge.
- There is also new cell deposition occurring, but the focus is still on cell enlargement rather than maximum wall thickening.

4. **Analyze the Maturation Phase**:
- In this phase, cells attain their maximum size.
- The walls of the cells thicken significantly during this phase.
- There is a substantial deposition of cellulose compared to the earlier phases.

5. **Conclusion**:
- Based on the characteristics of each phase, the phase in which cells attain maximum size in terms of wall thickening growth per unit time is the **Maturation Phase**.

### Final Answer:
The cells of the **Maturation Phase** attain maximum size in terms of wall thickening growth per unit time.

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