Growth is irreversible process found at organisation level

Options

A. Subcellular growth
B. Cellular growth
C. Organ growth
D. All the above

Answer

To address the question regarding the irreversibility of growth at the organizational level, we can break down the concept step by step:

### Step-by-Step Solution:

1. **Understanding Growth**:
- Growth is defined as an irreversible and permanent increase in size, volume, or weight of an organism. This means once an organism grows, it cannot return to its previous size.

2. **Levels of Growth**:
- Growth can occur at various levels within an organism:
- **Subcellular Growth**: This refers to growth at the molecular or organelle level, where components within the cell increase in size or number.
- **Cellular Growth**: This involves an increase in the number of cells or the size of individual cells. For example, muscle cells can grow larger through hypertrophy.
- **Organ Growth**: This is the growth of specific organs within the body, such as the heart or liver, which can increase in size as the organism grows.
- **Organizational Growth**: This refers to the overall growth of the entire organism, which encompasses all the previous levels of growth.

3. **Irreversibility of Growth**:
- The key characteristic of growth is that it is irreversible. Once an organism has grown, it cannot shrink back to its original size. This applies to all levels of growth mentioned above.

4. **Conclusion**:
- Since growth occurs at subcellular, cellular, organ, and organizational levels and is irreversible in nature, the correct answer to the question is **"all the above"**.

### Final Answer:
The correct option is **D) All the above**.

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