Theory of Biogenesis explains

Options

A. origin of first life
B. Life arising from pre-existing lifw
C. Life camera from outer space
D. Creation of lfe by super natural power

Answer

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

1. **Understanding the Theory of Biogenesis**: The theory of biogenesis posits that life arises from pre-existing life. This concept was established through experiments conducted by Louis Pasteur in the 19th century.

2. **Louis Pasteur's Experiment**: In 1859, Pasteur conducted a series of experiments using flasks containing nutrient medium. He aimed to demonstrate that microorganisms do not spontaneously generate but rather come from existing microorganisms.

3. **First Experiment**: Pasteur heated the nutrient medium in a flask and then attached a long neck to it. This design allowed air to enter but prevented dust and microorganisms from contaminating the medium. As a result, no bacterial growth occurred, supporting the idea that life does not arise spontaneously.

4. **Second Experiment**: In the next experiment, Pasteur used a flask with a short neck. This time, the medium was exposed to the air more directly, allowing microorganisms to enter. Consequently, bacterial growth was observed, indicating that new life forms could arise from existing life.

5. **Third Experiment**: Pasteur tilted the flask with the nutrient medium, allowing the trapped microorganisms in the neck to come into contact with the medium. This led to bacterial growth, further confirming that life arises from pre-existing life.

6. **Conclusion**: The conclusion drawn from Pasteur's experiments is that life does not originate from non-living matter but rather from existing living organisms. This principle is encapsulated in the theory of biogenesis.

7. **Correct Answer**: Based on the explanation of the theory of biogenesis, the correct answer to the question is that it explains that life arises from pre-existing life.

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