Read the following statements.How many of the given statements is(are) correct?

Options

A. In unicellular organisms term growth and reproduction are used interchangably
B. Reproduction cannot be a defining character of living organism
C. Mules and worker bee are sterile
D. Regeneration is a kind of asexual reproduction in which fragmented organism regenerates the lost part

Explanation

To determine how many of the given statements are correct, let's analyze each statement one by one.

### Step-by-Step Solution:

1. **Statement 1**: "In unicellular organisms, the terms growth and reproduction are used interchangeably."
- **Analysis**: In unicellular organisms, growth occurs through cell division. When a unicellular organism grows, it divides to form new cells. Therefore, growth and reproduction are indeed synonymous in this context.
- **Conclusion**: This statement is **correct**.

2. **Statement 2**: "Reproduction cannot be a defining character of living organisms."
- **Analysis**: While reproduction is a fundamental characteristic of living organisms, it is not the defining characteristic. Metabolism is often considered the defining characteristic of life. Thus, reproduction is essential but not definitive.
- **Conclusion**: This statement is **correct**.

3. **Statement 3**: "Mules and worker bees are sterile."
- **Analysis**: Mules (the offspring of a horse and a donkey) are indeed sterile and cannot reproduce. Worker bees are also sterile and do not produce offspring. Therefore, this statement is accurate.
- **Conclusion**: This statement is **correct**.

4. **Statement 4**: "Regeneration is a kind of asexual reproduction in which fragmented organisms regenerate the lost part."
- **Analysis**: Regeneration is indeed a mode of asexual reproduction where an organism can regrow lost parts. This process involves the fragmentation of the organism, which can regenerate its lost parts.
- **Conclusion**: This statement is **correct**.

### Final Conclusion:
All four statements are correct. Therefore, the answer to the question is that **all four statements are correct**.

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