The scientist related with the theory of biogenesis and experiments with swan-necked flasks is

Options

A. Von-Helmont
B. Louis Pasteur
C. Miller
D. Haeckel

Answer

**Step-by-Step Solution:**

1. **Understanding the Question:**
The question asks for the scientist associated with the theory of biogenesis and experiments involving swan-necked flasks.

2. **Defining Biogenesis:**
The theory of biogenesis states that life arises from pre-existing life, as opposed to spontaneous generation, which suggests that life can arise from non-living matter.

3. **Identifying the Experiment:**
The swan-necked flask experiment was conducted to demonstrate that microorganisms in the air contaminate sterile solutions, thus supporting biogenesis and disproving spontaneous generation.

4. **Evaluating the Options:**
- **Von Helmont:** Incorrect; he is known for his work on photosynthesis.
- **Louis Pasteur:** Correct; he is credited with the theory of biogenesis and conducted the swan-necked flask experiments.
- **Miller:** Incorrect; he is known for the Miller-Urey experiment, which simulated early Earth conditions to demonstrate the formation of organic compounds.
- **Haeckel:** Incorrect; he is known for his work in ecology and phylogeny, not biogenesis.

5. **Conclusion:**
The correct answer is **Louis Pasteur**, as he established the theory of biogenesis and performed the swan-necked flask experiments.

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