A bacterium is capable of withstanding extreme heat dryness and toxic chemicals. This indicates that it is probably able to form

Options

A. A thick peptidoglycan wall
B. Endospores
C. Endotoxins
D. Endogenous buds

Answer

To solve the question about the bacterium that can withstand extreme heat, dryness, and toxic chemicals, we will analyze the characteristics of such bacteria and identify the structure they form to survive in these harsh conditions.

### Step-by-Step Solution:

1. **Understanding the Environment**: The question states that the bacterium can withstand extreme heat, dryness, and toxic chemicals. This indicates that it is in a stressful or unfavorable environment.

**Hint**: Consider what types of conditions bacteria might face in extreme environments.

2. **Survival Mechanisms of Bacteria**: Bacteria have developed various survival mechanisms to endure harsh conditions. One common mechanism is the formation of specialized structures that allow them to survive until conditions improve.

**Hint**: Think about what structures bacteria form to survive unfavorable conditions.

3. **Identifying the Structure**: In response to extreme conditions, many bacteria can form a dormant structure known as an endospore. Endospores are resistant to heat, desiccation, and chemicals, allowing the bacteria to survive until favorable conditions return.

**Hint**: Recall the term for the dormant, heat-resistant structures formed by some bacteria.

4. **Evaluating the Options**: The options provided include:
- Thick peptidoglycan wall
- Endotoxins
- Endogenous buds
- Endospores

Among these, the only option that describes a structure capable of withstanding extreme conditions is "endospores."

**Hint**: Compare each option with the characteristics of the bacteria mentioned in the question.

5. **Conclusion**: Therefore, the correct answer to the question is that the bacterium is probably able to form **endospores**.

### Final Answer:
The bacterium is probably able to form **endospores**.