First life consisted of

Options

A. Provirus
B. Virus
C. Bacteria
D. Protovirus

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the first form of life that existed on Earth.

2. **Analyzing the Options**: The options provided are:
- Provirus
- Virus
- Bacteria
- Protorvirus

3. **Defining Key Terms**:
- **Provirus**: A viral genome that has been incorporated into the host's DNA.
- **Virus**: A modern-day virus that can infect living organisms.
- **Bacteria**: Single-celled organisms that are among the earliest forms of life.
- **Protorvirus**: A term used to describe primitive viruses, which are believed to be the earliest forms of life.

4. **Referring to Scientific Studies**: According to H.M. Tamman, the first life forms were primitive viruses, referred to as protoviruses. These protoviruses are considered ancestors of modern viruses.

5. **Conclusion**: Based on the information and definitions, the first life consisted of **protoviruses**.

**Final Answer**: The first life consisted of protoviruses.

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