During favourable conditions, Amoeba reproduces by:

Options

A. Binary fission
B. Multiple fission
C. Both of these
D. None of these

Answer

### Step-by-Step Solution:

1. **Understanding Amoeba**:
- Amoeba is a unicellular organism, meaning it consists of only one cell.

2. **Reproduction in Favorable Conditions**:
- During favorable conditions, Amoeba primarily reproduces asexually.

3. **Binary Fission**:
- The process of reproduction that Amoeba uses under favorable conditions is called Binary Fission. This is a method where one parent cell divides into two identical daughter cells.

4. **Process of Binary Fission**:
- In Binary Fission, the following steps occur:
- **Nuclear Elongation**: The nucleus of the Amoeba elongates.
- **Formation of Groove**: A groove begins to form in the cell membrane as the cell prepares to divide.
- **Karyokinesis**: The nucleus divides, which is known as karyokinesis.
- **Cytokinesis**: The cytoplasm also divides, leading to the formation of two separate daughter cells.

5. **Conclusion**:
- Therefore, the correct answer to the question is that during favorable conditions, Amoeba reproduces by **Binary Fission**.