The presence of salts (NaCl and others) in animal body fluid gives an inference that life originated in the

Options

A. Primitive ocean
B. Rain water lakes
C. Salt solution
D. All of these

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the inference that can be drawn from the presence of salts (such as NaCl) in animal body fluids regarding the origin of life.

2. **Identifying the Role of Salts**: Salts, including sodium chloride (NaCl), are essential components of body fluids in animals. They play crucial roles in various physiological processes.

3. **Theories of Life's Origin**: It is widely accepted that life originated in water. This concept is supported by various scientific theories.

4. **Key Scientists and Theories**: The theory that life began in the oceans was notably proposed by Russian scientist Alexander Oparin and British scientist J.B.S. Haldane. They suggested that the early Earth had a primordial soup rich in organic molecules.

5. **Primordial Soup Concept**: Haldane referred to these early oceans as a "hot dilute soup," where various organic molecules could form and evolve into more complex structures, eventually leading to the emergence of life.

6. **Connection to Marine Water**: Since marine water is rich in salts, the presence of salts in animal body fluids suggests that life may have originated from these primordial oceans, where the necessary conditions for life were present.

7. **Conclusion**: Therefore, the inference that can be drawn from the presence of salts in animal body fluids is that life originated in primitive oceans.

**Final Answer**: The presence of salts (NaCl and others) in animal body fluids gives an inference that life originated in the primitive oceans.

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