How many cells are present in a unicellular organism ?

Options

A. One
B. Two
C. Three
D. Four

Answer

### Step-by-Step Solution:

1. **Understanding Unicellular Organisms**:
- A unicellular organism is defined as an organism that consists of a single cell. This means that all the necessary life functions such as metabolism, reproduction, and response to the environment are carried out by that one cell.

2. **Identifying the Number of Cells**:
- Since the definition of a unicellular organism specifies that it is made up of only one cell, we can conclude that the number of cells present in a unicellular organism is exactly one.

3. **Evaluating the Options**:
- The question may provide multiple-choice options. In this case, the options might include numbers like 1, 2, 3, and 4.
- Based on our understanding, the only correct option is 1, as all other options (2, 3, and 4) represent multicellular organisms, which are composed of two or more cells.

4. **Conclusion**:
- Therefore, the answer to the question "How many cells are present in a unicellular organism?" is **1**.