Theory of ablogenesis or spontaneous generation was finally disapproved by

Options

A. Louis Pasteur
B. A.I. Oparin
C. A.R. Wallace
D. Sydney Fox

Answer

**Step-by-Step Solution:**

1. **Understanding the Theory of Spontaneous Generation**: The theory of spontaneous generation, also known as ablogenesis, posits that living organisms can arise from non-living matter. This idea suggests that life can spontaneously emerge from decaying or inanimate substances.

2. **Historical Context**: The concept was notably supported by Aristotle, who conducted experiments suggesting that maggots could arise from decaying meat. He believed that life could originate from non-living materials if they contained a "vital heat."

3. **Challenge to the Theory**: Over time, many scientists questioned and tested the validity of spontaneous generation. They sought to find evidence that living organisms could only arise from other living organisms.

4. **Louis Pasteur's Contribution**: Among the scientists who challenged this theory, Louis Pasteur is the most significant. He conducted a famous experiment known as the swan-neck flask experiment. This experiment demonstrated that microorganisms in the air were responsible for contamination and that life did not spontaneously arise from non-living matter.

5. **Conclusion**: Pasteur's experiments provided conclusive evidence against the theory of spontaneous generation, leading to its disapproval. Therefore, the correct answer to the question is Louis Pasteur.

**Final Answer**: The theory of ablogenesis or spontaneous generation was finally disapproved by Louis Pasteur.

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