Operin and Haldan'e theory is also called

Options

A. Chemical theory of origin of life
B. Modern theory of origin of life
C. Naturalistic theory
D. All of the above

Answer

**Step-by-Step Solution:**

1. **Identify the Scientists**: The theory in question is attributed to two scientists: Alexander Ivanovich Oparin, a Russian scientist, and J.B.S. Haldane, a British scientist.

2. **Understand the Theory**: Oparin and Haldane proposed a theory regarding the origin of life, which is known as the "chemical evolution" theory. This theory suggests that life originated from non-living matter, particularly from inorganic substances.

3. **Key Components of the Theory**: According to their theory, the first organic compounds, such as amino acids, formed from inorganic substances. These compounds then combined to create more complex molecules, leading to the emergence of life.

4. **Names of the Theory**: The Oparin-Haldane theory is also referred to by several names:
- Chemical theory of origin of life
- Modern theory of origin of life
- Naturalistic theory

5. **Select the Correct Answer**: Since the theory is known by all three names mentioned above, the correct answer to the question is "all of the above."

**Final Answer**: Oparin and Haldane's theory is also called "all of the above."

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