First cell produced on Earth is :

Options

A. metazoa
B. protozoa
C. protobiont
D. none of these

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the first cell produced on Earth and provides four options: Mathesor, Protozoa, Protoband, and none of these.

2. **Exploring the Origin of Life**: The origin of life is a complex process believed to have involved natural processes that converted non-living matter into organic compounds. This is crucial for understanding what the first cell might have been.

3. **Defining Protobionts**: Protobionts are considered precursors to prokaryotic cells. They are clusters of organic molecules that can carry out some physiological processes and have the capability of reproduction. This makes them a significant candidate for the first cell.

4. **Analyzing Other Options**:
- **Protozoa**: These are single-celled eukaryotic organisms. They are more complex than the first cells and cannot be considered the first form of life.
- **Metazoa**: These are multicellular eukaryotic organisms, which include all animals. They are also too complex to be the first cell.
- **None of these**: This option does not apply since we have identified a potential candidate.

5. **Conclusion**: Based on the definitions and characteristics discussed, the correct answer is **Protobionts** (option C), as they represent the simplest form of life that could have existed on early Earth.

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