Who demonstrated that life comes from life with the help of flask with boiled broth?

Options

A. Redi
B. Pasteur
C. Van Helmont
D. Arrhenius

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the scientist who demonstrated that life arises only from pre-existing life using a specific experimental setup involving flasks with boiled broth.

2. **Identifying Key Scientists**: The key scientists mentioned in the context of the origin of life are Louis Pasteur, Reddy Pashir, Van Helmont, and Araneus. However, we need to focus on the one who conducted the relevant experiment.

3. **Recognizing the Theory**: The theory of abiogenesis suggests that life can arise from non-living matter. Louis Pasteur is known for rejecting this theory, asserting that life comes only from existing life.

4. **Describing Pasteur's Experiment**: Louis Pasteur conducted the Swan-Neck Flask experiment. In this experiment, he boiled broth in flasks to kill any existing microorganisms and then left the flasks open to the air but with a curved neck that prevented contaminants from entering.

5. **Observing the Results**: The boiled broth remained sterile as long as the neck of the flask was intact, demonstrating that no new life could arise from the broth without contamination. When the neck was broken, microorganisms from the air could enter, leading to microbial growth in the broth.

6. **Conclusion**: Pasteur's experiment conclusively demonstrated that life does not arise spontaneously from non-living matter but rather from existing living organisms. Thus, the correct answer to the question is **Louis Pasteur**.

7. **Final Answer**: The scientist who demonstrated that life comes from life using a flask with boiled broth is **Louis Pasteur**.

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