Biogenesis was first proposed by ..........

Explanation

**Step-by-Step Text Solution:**

1. **Identify the Concept of Biogenesis**: Biogenesis is the theory that life arises from pre-existing life, as opposed to abiogenesis, which suggests that life can arise from non-living matter.

2. **Historical Context**: The theory of biogenesis was first proposed in the 17th century, during a time when many scientists were exploring the origins of life.

3. **Key Scientist**: The scientist who is credited with proposing the biogenesis theory is Francesco Redi.

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