Transverse binary fission occurs in

Options

A. Euglena
B. Paramecium
C. Hydra
D. Amoeba

Answer

To solve the question regarding which organism undergoes transverse binary fission, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Types of Binary Fission**:
- Binary fission is a method of asexual reproduction where a single organism divides into two parts.
- There are two types of binary fission:
- **Transverse Binary Fission**: The organism divides across its width.
- **Longitudinal Binary Fission**: The organism divides along its length.

2. **Identify the Organisms in the Options**:
- The options given are:
1. Helino
2. Paramecium
3. Hydra
4. Amoeba

3. **Analyze Each Organism**:
- **Helino**: Not a commonly referenced organism in this context, so we can set it aside.
- **Paramecium**: Known for reproducing by transverse binary fission, where it divides across its width.
- **Hydra**: Reproduces by budding, not binary fission.
- **Amoeba**: Reproduces by simple binary fission, typically without a fixed axis, and does not exhibit transverse fission.

4. **Conclusion**:
- Based on the analysis, the organism that undergoes transverse binary fission is **Paramecium**.

### Final Answer:
Transverse binary fission occurs in **Paramecium**.

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