Who performed swan-necked flask experiment in support of biogenesis?

Explanation

**Step-by-Step Solution:**

1. **Understanding Biogenesis**: Biogenesis is the theory that living organisms arise from pre-existing life forms. This contrasts with abiogenesis, which suggests that life can arise from non-living matter.

2. **Identifying the Scientist**: The scientist who conducted the swan-necked flask experiment to support the theory of biogenesis is Louis Pasteur.

3. **Description of the Experiment**: In 1864, Pasteur designed the swan-necked flask experiment. He used a flask with a long, curved neck (resembling a swan's neck) to allow air to enter while preventing dust and microorganisms from contaminating the broth inside.

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