Extra - terrestrial origin of life was proposed by theory of

Options

A. Catastrophism
B. Spontaneous generation
C. Special creation
D. Panspermia

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the theory that proposes the extraterrestrial origin of life. We need to identify which of the given options aligns with this concept.

2. **Evaluating the Options**:
- **Option 1: Catastrophism**: This theory, proposed by George Cuvier, suggests that the Earth has been shaped by sudden, violent events. It does not address the origin of life, particularly not in an extraterrestrial context. Therefore, this option is incorrect.

- **Option 2: Spontaneous Generation**: This theory, attributed to Aristotle, posits that living organisms arise from non-living matter. While it discusses the origin of life, it does not mention anything about extraterrestrial origins. Thus, this option is also incorrect.

- **Option 3: Special Creation**: This concept refers to the idea that a divine creator or energy is responsible for the creation of life and the universe. Like the previous theories, it does not propose an extraterrestrial origin of life, making this option incorrect as well.

- **Option 4: Panspermia**: This theory suggests that life on Earth may have originated from microorganisms or chemical precursors of life present in space, which were brought to Earth by comets, meteoroids, or space dust. This theory directly addresses the extraterrestrial origin of life, making it the correct option.

3. **Conclusion**: After evaluating all the options, the correct answer to the question "Extra-terrestrial origin of life was proposed by theory of" is **Panspermia**.

**Final Answer**: The correct option is **Panspermia**.

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