Which of these are included in phases of growth?

Options

A. Phase of cell enlargement
B. Phase of cell maturation
C. Phase of cell formation
D. All of these

Answer

To answer the question "Which of these are included in phases of growth?", we will analyze the options given and understand the phases of plant growth.

### Step-by-Step Solution:

1. **Understanding Growth**:
- Growth in plants is a fundamental characteristic and is defined as an irreversible increase in size. This can involve the increase of an organ, a part of an organ, or even an individual cell.

2. **Identifying the Phases of Growth**:
- The growth period in plants is typically divided into three main phases:
- **Meristematic Phase**: This is where cells are actively dividing. The cells in this phase are called meristematic cells, which have primary cell walls made of cellulose.
- **Elongation Phase**: In this phase, cells undergo enlargement and vacuolation. New cell walls are deposited, leading to an increase in cell size.
- **Maturation Phase**: During this phase, cells reach their maximum size. This involves wall thickening and modifications in the protoplasm.

3. **Analyzing the Options**:
- The options provided include:
- Phase of cell enlargement
- Phase of cell maturation
- Phase of cell formation
- All of these
- Each of these phases corresponds to the processes occurring during the growth phases identified above.

4. **Conclusion**:
- Since all the listed phases (cell enlargement, cell maturation, and cell formation) are integral parts of the growth process in plants, the correct answer is "All of these".

### Final Answer:
The phases included in growth are: **All of these**.

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