The common mode of reproduction in bacteria is

Options

A. endospore formation
B. binary fission
C. sexual reproduction
D. conjugation

Answer

### Step-by-Step Solution:

1. **Identify the Types of Reproduction in Bacteria**:
- Bacteria can reproduce through various methods, including sexual reproduction, conjugation, endospore formation, and binary fission.

2. **Evaluate Sexual Reproduction**:
- Sexual reproduction involves the fusion of gametes and is not the primary mode of reproduction in bacteria. Bacteria primarily reproduce asexually.

3. **Consider Conjugation**:
- Conjugation is a process of horizontal gene transfer where two bacterial cells come into direct contact to exchange genetic material. While it does involve reproduction in a broader sense, it is not the common method of reproduction.

4. **Examine Endospore Formation**:
- Endospore formation occurs under unfavorable conditions (e.g., starvation or extreme heat) as a survival mechanism. It is not a primary mode of reproduction but rather a means of survival.

5. **Analyze Binary Fission**:
- Binary fission is the most common method of reproduction in bacteria. It is an asexual process where a single bacterial cell divides into two nearly equal-sized daughter cells. The genetic material is replicated, and the cell divides, resulting in two genetically identical cells.

6. **Conclusion**:
- Based on the analysis, the common mode of reproduction in bacteria is binary fission.

### Final Answer:
The common mode of reproduction in bacteria is **binary fission**.

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