Microbodies are

Answer

### Step-by-Step Solution:

1. **Definition of Microbodies**: Microbodies are specialized organelles found within cells. They play crucial roles in various metabolic processes.

2. **Presence in Organisms**: Microbodies are not limited to a specific type of organism; they are found in plants, animals, and protozoa. This indicates their widespread importance in cellular functions across different life forms.

3. **Structure of Microbodies**: Microbodies are characterized as being vesicle-like structures. They are classified as single membrane-bound organelles, which means they have a membrane surrounding them, distinguishing them from non-membrane-bound organelles.

4. **Types of Microbodies**: The main types of microbodies include:
- **Peroxisomes**: Involved in the breakdown of fatty acids and the detoxification of hydrogen peroxide.
- **Glyoxysomes**: Found in plants, they convert stored fats into carbohydrates during seed germination.
- **Hydrogenosomes**: Present in some anaerobic protists, they are involved in energy metabolism.

5. **Evaluating the Options**:
- **Option A**: "Membrane-bound minute vesicles" – This is correct as microbodies are indeed single membrane-bound organelles and are small in size.
- **Option B**: "Non-membrane-bound organelles" – This is incorrect since microbodies are membrane-bound.
- **Option C**: "Present only in animals" – This is also incorrect because microbodies are found in plants and protozoa as well.

6. **Conclusion**: Based on the analysis, the correct answer is **Option A**: "Membrane-bound minute vesicles".