The origin of life from pre-existing life is propounded by

Options

A. Biogenesis theory
B. Abiogenesis theory
C. Special creation theory
D. Extra terrestrial theory

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the theory that proposes the origin of life from pre-existing life. This means we need to identify which theory supports the idea that life arises from other living organisms.

2. **Exploring Different Theories**:
- **Abiogenesis**: This theory suggests that life originated from non-living matter. It posits that life can arise spontaneously from inorganic substances. This theory does not support the idea of life coming from pre-existing life, so it can be ruled out.

- **Special Creation**: This theory states that life was created by a supernatural power (like God). While it addresses the origin of life, it does not specifically mention the concept of life arising from pre-existing life, so it is not the correct answer.

- **Extraterrestrial Theory (Panspermia)**: This theory suggests that life exists throughout the universe and is distributed by space dust, meteoroids, or comets. Although it implies life could come from other celestial bodies, it does not focus on the idea of life arising from pre-existing life on Earth.

- **Biogenesis**: This theory states that life arises from existing living organisms through reproduction. It was famously attributed to Louis Pasteur, who demonstrated that life does not spontaneously arise from non-living matter. This theory directly supports the idea that life originates from pre-existing life.

3. **Conclusion**: Based on the analysis of the theories, the correct answer to the question is the **Biogenesis Theory**, which posits that life arises from pre-existing life.

**Final Answer**: The origin of life from pre-existing life is propounded by the **Biogenesis Theory**.

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