Dehydrated thick -walled bacterial cells having dipicolinic acid are

Options

A. Endospores
B. Conidia
C. Exospores
D. Oidia.

Answer

To solve the question regarding dehydrated thick-walled bacterial cells containing dipicolinic acid, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for a type of bacterial cell that is dehydrated, has a thick wall, and contains dipicolinic acid.

2. **Identify the Options**: The options given are:
- A) Endospore
- B) Conidia
- C) Exospores
- D) Oidia

3. **Analyze Each Option**:
- **Option A: Endospore**: Endospores are known to be thick-walled, dehydrated structures formed by certain bacteria to survive harsh conditions. They contain DNA and dipicolinic acid, which helps in stabilizing the DNA and protecting it from damage.
- **Option B: Conidia**: Conidia are asexual spores produced by fungi, not bacteria. They do not contain dipicolinic acid and are not thick-walled in the same sense as endospores.
- **Option C: Exospores**: Exospores are also spores produced by fungi or algae and do not contain dipicolinic acid. They are not specifically associated with bacteria.
- **Option D: Oidia**: Oidia are another type of asexual spore produced by algae and are not related to the characteristics mentioned in the question.

4. **Conclusion**: Based on the analysis, the only option that fits the description of being a dehydrated thick-walled bacterial cell containing dipicolinic acid is **Option A: Endospore**.

### Final Answer:
The correct answer is **A) Endospore**.

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