Which of these microorganisms can produce their own food?

Options

A. Bacilli
B. Amoeba
C. Rhizopus
D. Chlamydomonas

Answer

To determine which of the given microorganisms can produce their own food, we will analyze each option one by one.

1. **Bacilli**:
- Bacilli are a type of bacteria. They belong to the prokaryotic group of organisms. While some bacteria can produce their own food (like cyanobacteria), typical bacilli do not have this ability. They are heterotrophic, meaning they rely on other organisms for their food.
- **Conclusion**: Bacilli cannot produce their own food.

2. **Amoebae**:
- Amoebae are single-celled organisms classified under the kingdom Protista. They are eukaryotic and are known for their ability to move and capture food using pseudopodia (false feet). They do not have the capability to produce their own food and are also heterotrophic.
- **Conclusion**: Amoebae cannot produce their own food.

3. **Rhizopus**:
- Rhizopus is a type of fungus, commonly known as bread mold. Fungi are heterotrophic organisms, meaning they obtain their nutrients by absorbing organic matter from their environment. They cannot perform photosynthesis and thus cannot produce their own food.
- **Conclusion**: Rhizopus cannot produce its own food.

4. **Chlamydomonas**:
- Chlamydomonas is a type of green algae. Algae are known to be autotrophic organisms, which means they can produce their own food through the process of photosynthesis. They contain chlorophyll, allowing them to capture sunlight and convert it into energy.
- **Conclusion**: Chlamydomonas can produce its own food.

**Final Answer**: The microorganism that can produce its own food is **Chlamydomonas**.