An irreversible or permanent increase in size, mass or volume of a cell, organ or organism is called as ________.

Options

A. growth
B. differentiation
C. dedifferentitation
D. development

Explanation

To answer the question, "An irreversible or permanent increase in size, mass or volume of a cell, organ or organism is called as ________," we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Key Terms**: The question mentions "irreversible," "permanent increase," and refers to "size, mass, or volume" of a cell, organ, or organism.

2. **Identify the Concept of Growth**: In biological terms, growth refers to an increase in size, mass, or volume that is permanent and cannot be reversed.

3. **Differentiate Between Related Terms**:
- **Growth**: This is the term that describes the permanent increase in size, mass, or volume.
- **Differentiation**: This refers to the process where cells become specialized and does not necessarily involve an increase in size.
- **De-differentiation**: This is a reverse process where specialized cells revert to a less specialized state.
- **Development**: This involves changes in the organism, which may include growth but also encompasses maturation and differentiation.

4. **Conclude with the Correct Term**: Given the definitions and the context of the question, the correct term that describes an irreversible or permanent increase in size, mass, or volume is **growth**.

### Final Answer:
An irreversible or permanent increase in size, mass or volume of a cell, organ or organism is called as **growth**.

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