Longitudinal binary fission is found in

Options

A. (a) Amoeba
B. (b) Paramecium
C. (c) Euglena
D. (d) None

Answer

To determine which organism undergoes longitudinal binary fission, we can follow these steps:

1. **Understand Binary Fission**: Binary fission is a form of asexual reproduction commonly found in unicellular organisms. It involves the division of a parent cell into two daughter cells after the duplication of genetic material.

2. **Identify Types of Binary Fission**:
- **Irregular Binary Fission**: This type occurs in any direction. An example of an organism that reproduces this way is **Amoeba**.
- **Longitudinal Binary Fission**: This type occurs in a vertical direction. Organisms that reproduce this way include **Euglena** and **Plasmodium**.
- **Transverse Binary Fission**: This type occurs in a horizontal direction. An example of an organism that reproduces this way is **Paramecium**.

3. **Analyze the Options**:
- **Amoeba**: Undergoes irregular binary fission.
- **Paramecium**: Undergoes transverse binary fission.
- **Euglena**: Undergoes longitudinal binary fission.
- **None of the above**: This option is not applicable since we have identified Euglena as the organism that undergoes longitudinal binary fission.

4. **Conclusion**: Based on the analysis, the organism that undergoes longitudinal binary fission is **Euglena**.

**Final Answer**: C) Euglena

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